piss2 spoken not polite
an act of urinating
go for/have/take a piss
• I need to have a piss.
3 British English
to annoy someone by laughing at them or making them seem stupid [↪ piss-take]:
• The kids always take the piss out of some teachers.
4 British English
to be at a pub or club, drinking a lot of alcohol:
• 'Where's Jo?' 'Out on the piss somewhere.'