if something 'sucks mum' it is simply very bad.
Steve: Hey wanna have sex?
Paul: Nah I cant ive gotta go melon shopping with mary
Steve: Awww that sucks mum
Paul: Yeah i no
by GP Man June 22, 2008
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"Suck your mum" is a term used to offend others. It originated in London and is widely used throughout all of Britain.
Roadman 1: Oi you likkle pussio, I heard you man been chatting shit

RoadBoy 1: Suck your mum bruv. I ain't no pussio to chat like that. If you gwarn start beef then lets do it.

PROCEED TO FIGHT..
by OfficialRoadBoyOneAndOnly June 23, 2018
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A phrase used by City Folk to tell people that their opinion on you is irrelevant and you don’t cares , hence the word ‘ suck your mum ‘ which means go occupy yourself with something else rather than concentrating on me .
Brad - “ Yo Jamie I heard you lost that skrap . “

Jamie - “ Suck your mum . “
by LondonSlangTing February 14, 2020
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when having and argument wiv someone this is the way to stop it.
go and suck your mum!!!!
by liam April 08, 2005
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Kid 1: oi bruv u got them tings we were on about ye?

Kid 2:nah bruv suck your mum
by Myginit August 05, 2020
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A british insult that most likely means that your mother is a tranny and you should go blow her. Only carries the same effect with a British or Australian accent.
"Go suck ur mum, ya filthy bastard."
by Buttlet McWeinerbarf May 07, 2016
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