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1.
One who has sexcual intercourse with ones own mother in law.
My wife has one sexy mother, so sexy in fact that I just had to fuck her. Afterwards I fucked my wife and compared the two.
Wasn't much in it, even their tits are alike, I guess I'm just one mean ass mother in law fucker!
by Slapp The Great May 02, 2006

Words related to Mother in law Fucker

fucker milf mother in law mum shag