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!!