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
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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 26, 2004
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A universally acknowledged comeback superior to all comebacks. It can be used in a sentence, or by itself as a phrase.
Doctor: You have chlamydia.
Patient: Ur mom.

Enemy: You look like a dumpster fire.
You: So did ur mom after I fucked her senseless.
by Bubblecove106 September 22, 2019
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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!"
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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
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Honestly you can say it for anything. Compliment, insult, describing your great aunt at her funeral! The possibilities are endless!
Ur mom: Hey Jimmy did you get your homework done?
Jimmy: ur mom

Karen: I dEmAnD tO sPeAk To ThE mAnAGeR!!! WhO iS hE!?!
Me: ur mom!
by Tessa2021 February 6, 2020
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The way people spell your mom when texting or IMing.

A thing stupid people who think they're cool like myself say as a come back 1., when they can't think of anything else to say 2.or when they think it's going to be funny3..

This action is usually followed shortly with a long obnocous OHHHHH from a random person most likely not involved with the conversation.
1. Guy-Dude! You're so stupid!
Guy 2- Your mom is stupid!
Random guy- OHHHHH!!!

2. Guy-How was your day today?
Guy 2-Ummm...YOUR MOM!
Random Guy- OHHHHH! You just got dissed!

3. Guy- I really like your new pants!
Guy 2-Your mom really likes my new pants! Ha! Get it! She likes my new pants!
Random Guy-...
Guy 2-(to random guy) Aren't you going to go OHHHHH!?
Random Guy- It wasn't funny.
by mooshi800 April 19, 2009
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