something very cringy you can call other people if you don't give a shit about what they're saying.
person 1: yo bro I found this girl I really like!
person 2: ur mom
"Ur mom is so fat that one picture of her filled up the whole phone storage"
Ur Mom means that you had sex with their mom leaving them concerned and confused.
Them:What were you doing last night.
YOU:Ur MoM
THEM:what the !@$#!
The most clever response to any insult ever.
mean person: ur ugly lol
smart person: ur mom
A phrase to use when making a joke
"Ur Mom so hot she's burning my eyes"