Your Mom literally means 'Your Mom'. Usually people mean it to be funny, or just because they can't crack back. So they just retaliate with the phrase "Your Mom"
Jimmy: Hey Doug, where were you yesterday???!?!?!?!
Doug: Doing your Mom, and she screamed like a whore!!!!!!!
Jimmy: That's nasty, my Mom has a mullet..............
Or...............this could happen.
Person: You're such a freaking whore!!!!!!!!!!!!
Person 2: Yeah well...... Your Mom's a whore too!!!!!!!!
Person: That is SO OLD!
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Doug: Doing your Mom, and she screamed like a whore!!!!!!!
Jimmy: That's nasty, my Mom has a mullet..............
Or...............this could happen.
Person: You're such a freaking whore!!!!!!!!!!!!
Person 2: Yeah well...... Your Mom's a whore too!!!!!!!!
Person: That is SO OLD!
T
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by The Retard! April 17, 2006

A phrase used when somebody doesn't know any good comebacks.
Also used as part of a joke
The woman who gave birth to you
Also used as part of a joke
The woman who gave birth to you
Person1: You're so gay
Person2: Your mom
Your mom's so fat she stepped in the ocean and said 'Who put this puddle here?'
Person: I'd like you to meet your mom, Casie
Person2: Your mom
Your mom's so fat she stepped in the ocean and said 'Who put this puddle here?'
Person: I'd like you to meet your mom, Casie
by Stepheli December 28, 2005

by biotch#452 June 5, 2003

an over used townie phrase. townies seem to think its some kind of insult, and the stupid townies, thats all of them, reply with 'your mom' to whatever you say to them ........................................................ idiots
Normal dude: hey, do you know where there bus station is?
Townie: YOUR MOM!
Normal dude: excuse me
Townie: YOUR MOM YOU FUKKIN FAGGOT!
Townie: YOUR MOM!
Normal dude: excuse me
Townie: YOUR MOM YOU FUKKIN FAGGOT!
by deadlyangel June 10, 2006

by Anonymous June 29, 2003

by Tarayourmom December 28, 2005

by yo momma June 7, 2003
