When a severely drunk and/or hungover person is trying to vomit into the john and they tip forward thereby taking a "Johnny Dipp". Extremely gross if there is any vomit already in there!
PETER: God damn, Greg, what happened to you?
(Greg has water and barf all over his hair and dripping down his face and body)
GREG: I was puking into the john and I fell forward!
PETER: Well, get into the shower and clean up! Don't get your Johnny Dipp all over my house!
(Greg has water and barf all over his hair and dripping down his face and body)
GREG: I was puking into the john and I fell forward!
PETER: Well, get into the shower and clean up! Don't get your Johnny Dipp all over my house!
by Bobby Brady June 24, 2006
Get the Johnny Dippmug.