Ur mum is a common insult used for no apparent reason. This also references to Yo Mama jokes. This humor is weird and sometimes unlikable.
by pigjacob June 27, 2018
Get the Ur mummug. by Nictjr November 14, 2020
Get the Ur mommug. “Time to go make billions of ur momma jokes without dying of cringe because it’s National Ur Momma Joke Day!”
by Jaundoce April 16, 2022
Get the National Ur Momma Joke Daymug. Quite the powerful comeback. So much so, that in an argument, it cannot be countered. Your opponent will drop dead after they hear it, so use it wisely.
by joeseph.mother September 28, 2021
Get the Ur Mommug. the absolute WORST insult even god can think of. Worse than all the “ur” insults on urban dictionary combined. When u say it, a planet explodes along with the human race.
Man 1:lol ur mom gay
Man 2:no u
Man 1: ur sisters a mister
Man 2:well ur grandma a splat
*MAN 1 REDUCES TO ASHES ALONG WITH THE HUMAN RACE AND URANUS*
Man 2:no u
Man 1: ur sisters a mister
Man 2:well ur grandma a splat
*MAN 1 REDUCES TO ASHES ALONG WITH THE HUMAN RACE AND URANUS*
by MEAGPERSON June 2, 2018
Get the ur grandma a splatmug. 
