The only real comeback to ya mum that isn't whining about how infantile your insulter is. We can only assume what is meant by 'this'.
Scenario 1-boring, slightly civilised

Tony: What are you doing tonight?
Gordon: ya mum!
Tony: Now do we really have to resort to this childishness?
Gordon: Does ya mum have to resort to childishness?

Scenario 2- Childish, good

Tony: What are you doing tonight?
Gordon: ya mum!
Tony: keep my mum out of this and I'll keep this out of ya mum
Gordon: Yes, master.
by kung-fu jesus October 30, 2004
Get the keep my mum out of this and I'll keep this out of ya mum mug.
The ONLY retort against a mom diss.
"If I wanted some cum back I'd get it off your mom's chin"

"Keep my mum out of this and I'll keep out of your mum!"


Note: Using this retort still means you're getting owned
by ihumpmarinesforbreakfast July 1, 2005
Get the keep my mum out of this and I'll keep this out of ya mum mug.