Top Definition
An insult one can fire back at someone who thinks it's funny to insult other peoples mothers.

The use of 'shitbish' must be used in proper context for full effect, that is, many years after the original "your mum" comment was made.
Keith: Your mama's so stupid she sold her car for petrol money.
Al (1 second later): Who is this Keith shitbish?
Keith: Ask your mum.

Keith: Your mama's so fat her belt's the equator.
Al (3 years later): Who is this Keith shitbish?
Keith: :-O
#shit #bitch #shitbitch #al #keith
by aluminium oxide November 13, 2011
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