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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It's now often used when people take liberties and don't care about the consequences, for instance someone living in a nice house and trashing it or ridings roughshod over neighbours, knowing he won't get evicted by the authorities.
Now he's taking the piss. He had his music cranked up again last night and parks in our parking space.
by notquitepatrick November 27, 2016
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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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To appear serious, but actually meaning the opposite - most of the time. Usually followed up by the 'piss taker' (the one who joked) revealing he/she was only joking.
'Hey did I ever tell you you're fucking pug ugly?'

'No you didn't and that hurt'

'I'm only taking the piss. You fucking filthy mongoloid.'
by Iwo June 13, 2007
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"hey bill, youre a fucking dick eater"
"what?"
"dont worry mate, im justt taking the piss"
by xxoo May 15, 2003
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Generally Irish expression with the implications:

1) To joke with someone, to say something without intending it.

2) (Similarly), To lie in an obvious manner.
1) E.g "The guy said I was a dick, but I knew he was taking the piss".

2) E.g "The driver told the Police that he was sober, they said "You're taking the piss" and arrested him.
by joshow December 2, 2015
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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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