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
Say this every time somebody asks you a question
Teacher: Timmy, did you do ur homework?
Timmy: No, I did your mom

Nerd getting pushed around: Stop guys, that hurts
Timmy: Thats what ur mom said last night
by Joel Bossy December 06, 2006
(1) The comeback to all of those witty insults that people choose to throw at you. often used in conjuction with your face.

(2) Great in awkward situations and when you can't think of anything to say...
(1) Dude 1: yea, my brother's going to college in a couple weeks
Dude 2: YEA, well your mom goes to college!
Dude 1: uh...YOUR FACE goes to college!
Dude 2: thats low dude. YOUR MOM'S FACE goes to college!
Dude 2: dude. that really is low.
Dude 1: PWNED
by un haiduc March 03, 2005
n. phrase overly used by teenagers, which is a great way to fill in sentences. is usually very funny, but can be offensive.
hey sarah, did you finish doing your homework? no andy, but i did finish doing your mom!
by Andy April 26, 2004
A joke used to be really funny. Most people get tired of it, but I don't. Some find it offensive, but it is a generic 'mom' we're talking about here.
Truth or Dare?
I dare you to do.....YOUR MOM!!! hahahahah! (does victory dance)
by Your Mom (actually Zewt) January 31, 2004
The first or second in an almost ritualistic chain of insults. Can also be used as a stand alone insult. It is best used by mixing it with part of the first speakers sentence. Often used when A: it makes no sense, or, B: it makes way too much sense.
-Ex 1-
Person 1: That's one tall building
Person 2: Your MOM is one tall building!
Person 1: Your FACE is one tall building!!
Person 2: Your MOM'S FACE is one tall buidling!!!
Everyone else in the room: Ooohhhh!!

-Ex 2-
Person 1: I don't think i'm gonna to make it to friday.
Person 2: Come ON man!
Person 1: Hehehe... I'll come on.... YOUR MOM! OH!!
by ymf December 22, 2007
what you say to anyone who is insulting you, or if you just want to make them mad.
guy 1: you're gay.
guy 2: your mom's gay.
guy 1: dude, that doesn't make sense.
guy 2: your mom doesn't make sense.
by chicken flavored rice May 15, 2008
1) the answer for any and every question.

2) what you say when there is nothing better to say.

3) only the greatest insult ever.

4) a phrase that is a target for lame jokes
1) Date:"So,what do you want for dinner tonight. Pizza or Tacos?"

You: "Your Mom"
- - - - - - - - - - - - - - -
2) Science Nerd:"Did you know the mosquitoes mate upside down?"

You: "So does Your Mom."
- - - - - - - - - - - - - - -
3) Girlfriend:"Baby, I Love You."

You:"That may be the case but I love Your Mom."
- - - - - - - - - - - - - - -
4) Your Mom is so stupid she thought that fruit punch was a gay boxer.
by Milli Rillows Movies April 23, 2008
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