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Insult, a northern England or Derby version of your mum or yo momma
As in "What were you doing last night?", "YER MAM!"
by Tom Chambers October 14, 2004
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yer mam is what northen people say to annoy other people. or to argue. Us northen people has a fascination with peoples mams
'what were you doing last night?' 'YER MAM'
'do you want a cuppa' 'nor but yer mam does'
or used to argue
by Ashleigh Jay April 23, 2008
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gleeful exclamation
also used as a random exclamation
lalalalalalala yer mam

"do you want a brew? , yer mam"
by bab April 19, 2004
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