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. 
by catso200 October 31, 2022
Get the YOUR MUMmug. when u eat a lemon than go play roblox than tell your 69 year old roblox bf that u wanna brake up and he comes to your house and it turns out he is your grandad hermit is it wendnasday oh yes it is says hermit than he morph in to a big ld monkyxfrogxxxtentashon man woman and he commits arson on jake paul and eats his rotton monkey strands of hair tessa brocks comes and eats dounuts on your frount porch the end just kidding again lolz
by crappy do daddy September 14, 2021
Get the your mummug.