It’s a dumb joke where boys try to defend there selfs, or to be “funny”.
Trevor: who you fuck last night?
Paul: Ur mom:)
Trevor: Damn it
by cacaboomboom April 18, 2020
Get a Ur mom:) mug for your coworker Callisto.
The world's most powerful insult, nothing can beat this.
Joe: I had such a great night last night.
Jim: I had such a great night with Ur Mom

The next day Jim gets beaten up.
by Burrito 🌯 May 20, 2018
Get a Ur Mom mug for your father-in-law José.
Ur Mom- a common comeback for when someone says....practically anything to you
Person 1:Hey Carl Whats up?
Person 2:Ur mom.

Person A:I had spaghetti last night.
Person B:I had Ur mom last night.

Joe:Im so worn out from basketball..
Carl:Im worn out from Ur mom.
by DtouchmycrumbD January 08, 2006
Get the Ur Mom. neck gaiter and mug.
My Friend: Hey what do you have to do after school today?

Me: Well I always have a to do list left for me.

Friend: What’s on it?

Me: Ur Mom
by hahaha6161 March 04, 2020
Get a Ur Mom mug for your daughter Zora.
Person one: What are you talking about? Humans breathe air!
Person two: Oh yeah, well, ur mom
(Person one shoots him/herself due to the shame and humiliation)
by mikeharr163 January 25, 2017
Get a ur mom mug for your Aunt Sarah.
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
by i luv jesse mccartney April 25, 2005
Get a ur mom mug for your bunkmate Abdul.
Ur Mom (Yoor' Mäm) n.
A way to let your home dogs know that you are sexually attracted to their birth mother leaving them with confusion on what you actually meant by this. Any bystanders will then outrageously yell ohhhhhhh leaving them with more confusion than the conversation started with.
Ex.
Home Dog: What you doing over there
You: Ur Mom
Bystanders: Ohhhhhhhhh!
Home Dog: 😕
by Jeromeismehnamr March 01, 2015
Get the Ur Mom neck gaiter and mug.