Definitions by GEJH

Your Mum 

'Your mum' is a cuss originating presumably from one of the many ghettos in the UK. Mainly used by chavs, it is a comeback to an insult that cannot be beaten in any other way. Also used as an answer to almost any question, it is one of the most universal cuss downs of the twenty first century as of yet.

Initiating insult:'Shut up you ignoramus.'
Comeback:'Why don't you tell your mum to shut up!'

or

(someone pointing at a hippo in a zoo)Q:'What's that?'
A:'Your mum!'

Your Mum by GEJH November 6, 2008