This is called the last straw phrase. It is not to be used faintly, once you use this phrase understand your may lose your life. It is the equivalent to spitting in a persons face.
Person 1: “Kyle you ain’t on nothing, we took your phone and money and you ain’t done anything”
Kyle: “what are you dumb? Suck your mum”
*FIGHT BREAKS* (You cannot say this phrase without some sort of conflict breaking out.
Kyle: “what are you dumb? Suck your mum”
*FIGHT BREAKS* (You cannot say this phrase without some sort of conflict breaking out.
by TheBritslangTranslator August 19, 2022
Get the Suck your mummug. Fred: OMG, you're such a gimp.
Bill: What's your mum?
Luke: This milk has gone off. It's all stale and lumpy.
Jane: What's your mum?
Etc.
Bill: What's your mum?
Luke: This milk has gone off. It's all stale and lumpy.
Jane: What's your mum?
Etc.
by Letty : ) April 17, 2008
Get the What's your mum?mug. Something indescribable with words, only with your eyes. Your eyes aren't capable of capturing the pure mass of your mother. The absolute planet of a woman. Usually used to insult someone and hurt them mentally. No one can recover from "your mum" especially if she sat on you.
by I'm funny.png March 19, 2021
Get the Your mummug. by Homeboy ze Homie April 26, 2020
Get the mummug. by lalala whatever February 26, 2020
Get the Ur mummug. 
