piss up

noun, verb — 3 senses

piss-up

nounalso spelled piss-up

1

Australia, Ireland, New Zealand, UK, Slang, Vulgar A party where people consume alcohol.

. . . passed: all bullshitted up for the pictures or a piss-up in the town.1950, Jocelyn Greene, The Goose Cathedral, The Bodley Head, page 14:
Last night a bunch of them turned out to a pub near Edgeware [sic] Road tube (where a few of them had helped treat the injured on the 7th), and we had a good old-fashioned piss-up courtesy of Europhobia's generous readers.2005, Tim Worstall, 2005: Dispatches from the Blogosphere, The Friday Project, p 228

1 more example

Therefore with the blessing of Lizzie (herself too upset to attend) Rupert had arranged a sort of pre-wake piss-up in the function room of his London club with a malt whisky tasting, several real ales on tap and a takeaway curry delivered.2010, Ben Elton, Meltdown, page 202:

Derived terms: couldn't organise a piss-up in a brewery
Related terms: piss, pissed

piss up

verb

1

Informal, Vulgar to screw up, make a mess of

2

Informal, Vulgar to blunder, to make a mistake

Related terms: piss up a rope, piss up the wall, piss it up the wall

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — authors: page histories for piss-up and piss up.