a word spit out at any given time or place when someone (most likely a complete idiot) has absolutely no idea what to say
Hilary: Have you beeen havin a affair?!
Bill: uhh...
Hilary: Tell me! Who have you been doin stuff with lately?
by michael jackson November 21, 2003
A normal response when a person is unable to come up with an intelligent comeback. Usually used by those with little or no imagination.
Guy 1: I need to get my car checked out.
Guy 2: I checked your mom out.
by AnnoyoedWithMommaJokes October 25, 2004
A phrase often used by townies as an insult. This is because they don't have the brain power to think up anything better then these two simple words (its a surprise they even remember that!) Commonly used by boys in pretence that they shagged your mom last night.
person 1: You stupid piece of shit,why the fuck did you do that?
townie 1: Your mom
by jaffacakes April 28, 2004
First of all, its YO MAMA as in...
Man, youre ugly
Yeah? Well Sos ya mama!
by tgrsbabe88 April 22, 2004
The American version of the insult used as a retoric when all other insults have:
a) Been used in the last sentance
b) Escaped your mind
c) Can't be used because your mummy won't let you sy them.
*&^% you you muther (*^%er. I'll beat your shit ass into a ^%$&er pie

Your MUM.
by Robert Manganaro March 16, 2004
comeback used by witless morons who cant think of anything to say i.e. my friend melissa
me:nice teeth melissa
melissa: ur mom has nice teeth
by melissa January 29, 2004
A completely stupid thing to say when someone is pissed off or has just been burned, but can't think of anything better.
Dude, you suck at this game!

Yeah well... your mom!
by TheBurninator December 10, 2003
a phrase one uses as an insult to some one.
"you are a bitch"
"your mom!"
by biotch#452 June 05, 2003

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