Background: I was born in Uxbridge (to parents from Manchester and Liverpool respectively), moved to Crawley, then to Bramhall, then finally to Loughborough, where I finished my primary education and had all my secondary education; I spent four years in Oxford, then three in Cambridge.
What do I call...
1. A body of water, smaller than a river, contained within relatively narrow banks?
Stream? To be honest I don't classify bits of water to this degree of granularity.
2. The thing you push around the grocery store?
Shopping trolley, or just trolley.
3. A metal container to carry a meal in?
I don't carry meals in metal containers. Unless you count the tinfoil thingies that takeaway comes in.
4. The thing that you cook bacon and eggs in?
Frying pan. Or whatever pan's to hand, actually.
5. The piece of furniture that seats three people?
Extremely large beanbag? Bed? :-) Probably "sofa" or "settee".
6. The device on the outside of the house that carries rain off the roof?
7. The covered area outside a house where people sit in the evening?
No idea. "Verandah", probably, but I'd be looking for a word rather than using a word that comes naturally to me.
8. Carbonated, sweetened, non-alcoholic beverages?
Fizzy drinks, or just "fizzy" (nouning adjectives weirds language).
9. A flat, round breakfast food served with syrup?
Oatcakes! ... I suspect my word for the thing they mean is "pancake", but I'd do this with oatcakes too, or Scotch pancakes.
BTW, sion_a points out from behind me that I mean North Staffs. oatcakes here, not the weird cardboard biscuit things.
10. A long sandwich designed to be a whole meal in itself?
Baguette, I guess, but it's only a whole meal in itself if it's the Hog Roast Baguette from the Oxford Sandwich Company, which has pork, apple sauce, stuffing and crackling in it. <drool>
11. The piece of clothing worn by men at the beach?
Er... trunks? Shorts?
12. Shoes worn for sports?
I think they want "trainers", but I don't wear trainers for sports. But then, I don't do sports, except karate, which I do barefoot. When I did sports at school, I wore pumps (at my first primary school), plimsolls (at later primary schools, and early secondary school) and hockey boots (at secondary school). I can't remember what we wore for netball or athletics, probably plimsolls.
13. Putting a room in order?
Sorry, run this concept by me again? :-) ("Tidying up", I guess, or just "Tidying".)
14. A flying insect that glows in the dark?
15. The little insect that curls up into a ball?
(I think "glow-worm" for the first, but I've never seen one. Probably "woodlouse" for the second, but caterpillars also curl up into a ball, as do ants, so frankly it's a bit of a daft question.)
16. The children's playground equipment where one kid sits on one side and goes up while the other sits on the other side and goes down?
17. How do you eat your pizza?
With gusto. Usually I lift the slices out of the box one by one with my fingers, and stuff them into my hungry little mouth. If it's pizza out of the oven rather than pizza out of a box, I cut the slices myself first, and then proceed as above.
18. What's it called when private citizens put up signs and sell their used stuff?
An excellent opportunity for bargain-hunting. I dunno, jumble sale? Car boot sale? Garage sale?
19. What's the evening meal?
Pizza! But seriously -- tea, or dinner. I use them pretty much interchangeably, to be honest.
20. The thing under a house where the furnace and perhaps a rec room are?
In Cambridge? "Damp".
Actually, we have one of these at home, and it's called the garage. It used to be a proper garage for a car, but the previous occupants sort of half-heartedly converted it into a barely-usable room, and now it contains the boiler and a load of junk (not all my junk any more!), and my sister wants to put a pool table in there, and my dad wants to put a pinball machine in there, and my mum just wants nothing to do with it. It's only under one room of the house, though, it's more or less level with the rest of the house. We have a weird house.
21. Oblate ellipsoid of leaven bread, cut, in two, along its major plane and filled with delicatessen goods?
Bun? Roll? Bap? It sort of depends what it looks like.
22. Narrow passageway, usually covered, to the back of a terrace of houses?
Alleyway, probably. Or passage. Or something. If it's a passageway between streets (e.g. the cut-through from French's Road to Harvey Goodwin Avenue) then it's a jitty.
23. Hairs which stand on end when an animal is frightened or angry or cold?
Hairs. Or is that what "hackles" is, when you talk about something's hackles rising? I never quite knew what that actually meant...
24. Bumps on surface of skin which appear around pores when human is frightened or angry or cold?
25. Process of infusing water with leaves of tea plant usually in a teapot?
"Making tea". I suppose I'd call it brewing if I had to use one word only, but I don't think I've ever called it that in real life.
26. Above process left too long such that an excess of bitter substances, mainly tannins, infuse into the drink, so spoiling it?
27. Pot with lid for oven, usually ceramic, for slowly cooking meat or similar in juices, stock, with vegetables?
Casserole dish. More likely to just call it "that pot thing, you know, the one with the... [waves hands] ... for wassname".
28. Can, usually for petrol or water, with handle and screw lid?
Er. Petrol can? Water carrier? I don't think I have a word for this.
29. Animal based term of endeerment [sic, <giggle>] for people?
"Me duck"? I dunno.
30. Beast of burden, smaller than a horse, with long ears?
31. Place where people take coal out of the ground?
32. Small, common red and black spotted beetle?
33. Hearty cooked breakfast involving eggs, bacon, sausages, black pudding etc?
Fried breakfast, possibly "fry-up".
34. That plant that kids throw at each other because it sticks to clothing?
Well, we did that with goosegrass, but I think they probably mean the thing with bigger burrs on, and I don't think we had a name for that.
35. Those little balls of froth on plants in spring, which contain some moth or other's eggs?
36. Girls' lower-half underwear?
Pants or knickers. Or briefs, or thongs, or bikini-briefs, or French knickers, or G-strings, or ... look, there are lots of different types of girls' underwear, okay?
37. Boys' lower-half underwear?
Pants or knickers. Or boxers, or briefs, or Y-fronts (ick), or... I think the guys are catching up with us on the knicker-choice front.
38. The cloth you had when you were little and always slept with, and perhaps sucked your tongue with?
I didn't do this. I didn't even suck my thumb, actually. I think I'd call it a comfort-blanket if someone else had such a thing.
39. Warm knitted top typically made of wool?
Pullover, or possibly jumper.
40. Baked in an oven, made of flour, butter, an egg, milk:
Er... this could be anything! Cake? Scone? Rock bun? Some type of bread?
41. A single thistledown seed flying free.
Damn, I think we had a word for these, but I can't remember it. I knew people who called them fairies, but that was a bit twee.
42. Place where you. Er. You know. Use the euphemism:
I use euphemisms all over the place. Can you be a bit more specific?
43. The sometimes grassy area in the middle of the street which separates both sides of the traffic:
44. What do you call the paper stuff you use to wipe your nose with?
45. When you use a machine that has a camera inside to make copies of a piece of paper and print it out, what are you doing?
46. What do you call a building that has three stories and three apartments in it, one on each floor?
"That place that used to be a smallish semi in central Cambridge." Er, block of flats, I guess.
47. What do you call the things (paper or plastic!) the grocery store folk put your purchases in so you can carry them home?
48. That big trash receptable you see at construction sights?
49. Those jeans with the bib?
Er, jeans for babies? (I think they mean dungarees, actually.)
50. That phone you carry with you?
51. That hand-held light you keep to scare off the monsters at night?
52. The front and back of your car?
Bonnet and boot.
53. The hair that hangs down over your forehead?
Irritating. Er, "fringe".
54. Another word for "butt"
Depending on context, "arse", "bum" or "bottom".
55. What are those pencils that have colors instead of graphite ("lead") in them?
Anyone who finds this sort of thing interesting should read (at least parts of ) The Lore and Language of Schoolchildren by Iona and Peter Opie. Fascinating and extremely comprehensive study of regional variation in children's slang, rhymes, customs, etc.