while your eating your meal, your notice a hair in your mouth.... you reach in with your fingers to pull it out, only to have your mates pissing themselves laughing, pointing & telling you "you've been winnipd"
A winnnip is a hair from between your asshole & your ballbag.
Pluck a winnip from between your asshole & your ballbag, secretly place in your friends (or not friend) meal, wait until you see them removing it from their mouth & spring the great news to them!!! You've just been Winnipd!!!
CAUTION: removal of winnips may cause tears.
ingestion may cause laughter at your expense!