Taking the piss
Taking the piss is a colloquial term meaning to either mock at the expense of others, or to be joking, without the element of offence; or to be 'unfair' and take more than is warranted. It is a shortening of the idiom taking the piss out of, which is an expression meaning to mock, tease, joke, ridicule, or scoff. Extracting the urine, Taking the Mickey (Mickey Bliss, Cockney rhyming slang), taking the Mick or taking the Michael are additional terms for making fun of someone. These terms are most often used in the United Kingdom, Ireland, South Africa, New Zealand, and Australia.