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1.
To go and have sex with your own mother. A negitive meaning. Highly disrespectfull.
Woman: Hey, where the hell you been with my car?
Man: Shut up cunt! Go fuck your mother!!!
by To Bad U DON'T KNOW July 10, 2006
 
2.
You may use "fuck Your Mother" when your in a really deep conversation and out of know where you say "fuck your mother" super fast and then you say "did you say something".
Ruben:Blah Blah Blah I wanna fuck the bitch.
Kevin:"fuck your mother".
Ruben:What? Did you say something?
Kevin:No. Did you?
Ruben:No.
back to conversation]
by Dope :] July 30, 2008