Yer mam 

Insult, a northern England or Derby version of your mum or yo momma

As in "What were you doing last night?", "YER MAM!"

Yer mam by Tom Chambers October 14, 2004

yer mam 

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
'FUCKING SLAGGGG' 'YER MAM'

yer mam by Ashleigh Jay April 23, 2008

yer mam 

gleeful exclamation
also used as a random exclamation

lalalalalalala yer mam

"do you want a brew? , yer mam"

yer mam by bab April 19, 2004