look up any word, like bye felicia:
 
9.
defenition 1: ur grandmas daughter, ur dads wife, ur aunts sister, ur cousins aunt, ur uncles sister, ur daughters grandma, ur grandpas daughter, ur sisters/brothers dads wife, UR MOM

defenition 2: a comeback that can replace any noun in a sentence
(also can be used with in bed)
1: is that ur mom? (aka any of the above)

2: ur a party pooper
ur moms a party pooper
(add in bed at the bed of any sentence and it makes sense)
ur a party pooper
ur moms a party pooper
..in bed
COMEBACK: really? usually she gets the party started!
by yer-maum April 24, 2003
258 168
 
1.
a cliched insult used by unorigional and moronic douche bags
"i want to kill you for being a total idiot."

"well, uh, ur mom!"
by m0rph3us August 15, 2004
1125 450
 
2.
A highly derogatory phrase which replaces the subject of a person's sentence to form a base and unoriginal form of retaliation (for those with difficulty thinking of witty comebacks).
"That was a great sandwich."
"Ur Mom was a great sandwich! Oh! Diss!"
by bamboo shoot October 25, 2004
737 223
 
3.
can either be used as a random word which people seem to think witty and bugs the hell out of people, or, obviously, your mom
Bob: What are you doing tonight?
Joe: Ur mom
by i luv jesse mccartney April 25, 2005
527 124
 
4.
Defenition 1: This word can replace a noun, if done correctly.

Defenition 2: If one can't think of a cool come back. This is the phrase to use.
Guy 1: "Whoa! U made cool sound effects with that paper bag..."
Guy 2: "UR MOM makes cool sound effect!"
by Kevin N' Kyle and Company May 01, 2005
556 179
 
5.
Use when someone is asking you a nosy question or just something stupid as hell.
Reminder: never say this in front of a person who does not have a mother.
SARAH: Hey, whatcha guys talkin' about?
ASHLEY: ur mom.
by Stephie Thong February 27, 2003
406 122
 
6.
The Universal answer to anything and everything.
"What is the meaning of life?"
"ur mom"

"What time is it?"
"ur mom"

"What's 2+2=?"
"ur dad... errm, I mean mom."
by Lanan September 24, 2005
457 212
 
7.
two words that can answer any questions.
joe: hey!
bill: hey!
joe: how r u?
bill: ur mom knows how i am. . .
joe: can u stop?!
bill: ur mom wants to stop . . .
joe: do you hav herpes?
bill: ur mom has herpes . . .
joe: shut up!!!
by Cami!!! September 15, 2006
287 138