piss-up(redirected from a piss-up)
slang A party, event, or other function at which a lot of alcohol is consumed. Primarily heard in UK. I was sick all weekend after going to that piss up on Friday night.
A social gathering at which people drink an excessive amount of alcohol. Bob didn't go to the party because he knew it was going to be nothing but a piss-up.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.