to let the air out of their balloon, to mock/make fun of them. Customarily, shortened to just take the piss.
From the movie Snatch:
"take the piss out of someone" is abbreviated to "take the piss"
Boris the Blade: (mutters vague insults at Tony)
Bullet Tooth Tony: Don't take the piss (i.e., out of me), Boris!
Boris: Fuck you!
Tony: (empties the magazine of his Desert Eagle .50 into Boris)
"take the piss out of someone" is abbreviated to "take the piss"
Boris the Blade: (mutters vague insults at Tony)
Bullet Tooth Tony: Don't take the piss (i.e., out of me), Boris!
Boris: Fuck you!
Tony: (empties the magazine of his Desert Eagle .50 into Boris)
by Roberto y Maria September 13, 2011

by Mike October 3, 2003

When you have to take a piss and you have to say it out loud. It mostly is said when your having sex It interrupts a crowd and makes some fucktards laugh
by Boomfuckalacka November 17, 2019

by PSUnited April 12, 2017

(n.) An expression used to describe a task which is nearly impossible to do while avoiding its by-products or consequences.
You want to go to a strip club without spending a lot of cash? Man, that's like trying to take a shit without pissing.
by Dwebbie Appleton May 31, 2009

Taking a piss off the Hollywood sign either is protesting the perfection wanted of people or physically urinating off said sign.
Man:”I went and got a drink.”
Man 2: “Oh no.”
Man: “Yeah I ended up Taking a piss off the Hollywood sign.”
Man 2: “Protesting?”
Man: “No... literally.”
Man 2: “Oh no.”
Man: “Yeah I ended up Taking a piss off the Hollywood sign.”
Man 2: “Protesting?”
Man: “No... literally.”
by Actually It Is *insert thing* September 17, 2019

It can just mean making fun of someone or something, but it can also mean taking liberties, like hogging all of something meant to be a shared resource for yourself.
That's the 35th time you've been back to the all-you-can-eat buffet table and filled three plates, Dave. You are taking the piss now.
by fiachdubh April 3, 2024
