suggests that the person who says this fucked your mum last night, but i dunno who would wanna fuck my mother (except my dad)


Related to: and your dad, and your mum, mother fucker, y tu madre.
A: You *&"£*("&(£(*"*(&
B: thats what your mum said last night
by drako December 22, 2004
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A phrase using ya mam which is also very good answer to any question.
Person 1: Thats very big
Person 2: Thats what ya mam said last night

Person 1: Thats Sick
Person 2: Thats what ya mam said last night!
by Jonathan Anderson October 23, 2003
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Opposite of 'thats what she said'. A phrase added to the front of another, innocent sounding statement, which is used to create a funny, possibly obscene, self esteem boosting comment implying that what has just been said is the opposite of what 'she' thinks.
Chris: Jordan your an absolute cunt. You told everyone im a virgin, you give me shit for not driving a Ford Cortina and you screwed my fucking missus!! Your just a useless piece of human garbage!

Jordan: Thats not what she said!

Chris: Thats it man your the biggest prick I know, im gonna fuck you up real good!

Jordan: Thats what she said!!
by Jonny, Jared and Jordan November 22, 2010
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a comeback or insult saying you slept with a persons momma and she was moaning and such
your ugly thats not what your momma said last night
by Groundhog July 26, 2006
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