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. A word used on social media when the person typing the post has 10 seconds and can’t be bothered to add two letters to the end of it.
Ur dum
by Meow5000 October 1, 2022
Get the urmug. 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. by lalala whatever February 26, 2020
Get the Ur mummug. word that can be used as the ultimate comeback from you friends
*****DO NOT USE IF PERSON DOES NOW HAVE A MOM*****
*****DO NOT USE IF PERSON DOES NOW HAVE A MOM*****
Person 1 : hay what are you doing?
Person 2 : ur mom
Person 1 : hey wanna hang today??
Person 2 : cant i'm hanging with ur mom
Person 1 : hey your cute
Person 2 : ur moms cute
Person 1 : ur ugly
Person 2 : so is ur mom
Person 2 : ur mom
Person 1 : hey wanna hang today??
Person 2 : cant i'm hanging with ur mom
Person 1 : hey your cute
Person 2 : ur moms cute
Person 1 : ur ugly
Person 2 : so is ur mom
by ur mom April 22, 2022
Get the ur mommug. 
