I personally havn't gone beyond deep fried squid onion rings however i know of a kid back from elementary who ate (bit, ripped, chewed, and swallowed) the entire front cover off of a math textbook. Took him almst the whole year and after that he moved onto a plastic ruler (got only 1/3 of the way).
Though i have never eaten them, pararie oysters. For those of you who don't live in Alberta they are the cooked scrotum of a cow.
O wait i ate veal (unwittingly) but thats not so much gross as it is cruel. (veal is baby lamb thats been strapped down all its life so it can't move. this make it insaly tender and absolutley horrifying)