To tease mercilessly or in such a way no one would believe you or to treat someone badly in order to get what you want.
1. (British & Australian very informal) to make a joke about someone or to make someone look silly (often + out of ) They always take the piss out of her because she's a Barry Manilow fan. 'You should wear miniskirts more often - you've got the legs for them.' 'Are you taking the piss?' (British & Australian very informal!)
2. (British & Australian very informal) to treat someone badly in order to get what you want Four pounds an hour is taking the piss. £50 for that old thing? That's just taking the piss.
by Devilish69 September 29, 2013
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To 'take a piss' means 'to urinate'.
Man, let's stop at that gas station. I've really got to take a piss.
by Felix Tue Visiyu August 25, 2006
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UK slang. Meaning "Are you kidding me?" Or are you serious?" Or "you have got to be joking right?"
"There's a spider on your leg."
"Are you taking a piss?"
by AppJaxx July 12, 2015
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To be essentially fucking with someone or to be condescending to someone by implying that they are stupid.

Refers to when someone says "Don't piss in my pocket and tell me its raining, jerky..."
Tom: "Thanks for the CD, I like rap music.."
Sue: "Are you taking a piss?"
Tom: "No, not at all. I really do like this CD. Thanks
a bunch...really."
by Christophe Graham July 6, 2006
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If your taking the piss it means you are being sarcastic about something but in a serious tone of voice
Friend 1: God look in the mirror ugly

Friend 2: Whatttt?? ;(

Friend 1: Haha, only joking. I'm just taking the piss ;)
by EbbyMc_03 May 16, 2016
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When you shoot yellow warm liquid out of your dick
John: Yo man what ya doing?
Me: Oh me? I'm shooting yellow liquid out of my dick

John: Oh u mean taking a piss?

Me: What?
by dicks yellow September 12, 2018
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To make someone who's trying to seem important less important. Derives from the piss-boner men wake up with in the morning, it's a fake boner. If you took the piss away, there would be no boner. Do you see?

That's the original meaning, however taking the piss now means just giving someone a ribbing and in the most part not meaning to be malicious.
Original meaning:

Guy 1: "Hey guys, what do you think to my awesome new haircut?"

Guy 2: "I think you look like a fucking prick, mate...you look like a real slob".

Other guys: "Haha, Guy 2 really took the piss out of guy 1!"

Meaning as it is now:

Guy 1: "Man, I only got a 45 on my last assignment"

Guy 2: "Haha that's fucking shit!"

Guy 1: "Don't be so mean"

Guy 2: "Cheer up man, I was only taking the piss"
by L-Shizzle November 16, 2007
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