unfortunately, i have bad luck with ingesting disgusting things...

1. before my grandma knew i was smoking cigs, i used to smoke in my room, and ash in a soda can, and yea you can guess the rest... i picked up the wrong can, when i started using this can it was half full of soda, by the time i was done, i got about half a mouth full of liquid, the rest was soaked up in ash and cigarette butts...
2. expired milk, like all the time, i'm really bad on checking the dates, there was this one time tho that comes to mind very clearly, i was sick-ish, and i made me a bowl of cereal, i thought it tasted kinda funny, but i wrote it off as the sickness messing with my taste, well later on i actually started puking, when i went to check the milk, it was outdated, and i don't mean by a day or two, i still to this day dont' know how the milk wasn't lumpy, usually rotten milk is lumpy or has some 'solid' feel to it, this was pure liquid
3. took a drink of my soda in the middle of the night, only to get a roach in my mouth...
4. working under the car, some shit fell in my mouth, i still don't know what it was, but i garuntee you will find nothing that tasted worse then that... it was like maybe the ammount of a few granules of pepper, but the taste was so strong i swear my mouth was filled to the brim with that shit... it was probably a mixture of oil, burnt belt, road grime, and who knows what else....
i've accidently stuck alot more nasty shit in my mouth, or some how wound up with disgusting shit in my mouth, but these are all i can remember at the time