ur mom

a highly intellectual phrase used as a punchline; it is considered one of the funniest jokes ever conceived globally on earth; government officials within area 51 have also reported that aliens, too, view this as the most humorous phrase known to their existence.

"Hey Conner! I just got a girlfriend!!"
"Really Ava?? That's awesome, what's she like?"
"...... ur mom."
*hysteric laughing noises ensue from both conner and ava*