it means your mother, but it is used at the most hilarious times. funny people say ur mom and if you don't think it's funny then you can leave and remove yourself from this page
What did you eat today? ur mom
when somebody wants to fuck your mom they say this
teacher - "omg hi!!! I missed you how were you?"
her friend - "ur mom"
Joey: hey jesse i'm gonna fuck ur mom
Jesse: my mom is dead *starts crying*
Joey: omg i'm really sorry i didn't know..
Jesse: fuck off dude i was joking *starts laughing
Joey: *awkwardly laughs*
Biden: hey Trump i'm gonna fuck ur mom
Trump: my mom is dead *starts crying*
Biden: omg i'm really sorry i didn't know..
Trump: fuck off dude i was joking *starts laughing
Biden: *awkwardly laughs*
A wierd kid trying to insult u or just trying to be cool
Me: hey!
That wierd kid: Ur mom
Me:well okay?