Spotted dick isn't a sausage, it's a pudding. It's steamed, made from suet and dried fruit (usually raisins), and is fantastic with piping hot custard
Disgusting foods... I have to go with Durian fruit too. I've never made it past the stench to even put it in my mouth.
I'll happily eat tentacles, yet can't bring myself to eat a soft-shell crab.
I was at a chinese restaurant in NYC once, and most of the menu consisted of spleen or stomach lining. I couldn't really bring myself to try that, either.
I can't vouch for the disgustingness of dog - I've never (knowingly) eaten it.