A humourous euphamism for faeces. Also can be used as a childish insult to siblings or friends.
1)'What took you so long?'
'I was making bumbiscuits.'

2) Shut your face you bumbiscuit.
by flingthecow October 28, 2007
faeces, poo, shit, turd.
I gotta go and bake a bum biscuit.
by turdinator June 11, 2004
This is more specifically defined as accidental excretion in the standing position, where the faeces is squashed into flat pebbles by the buttocks. Assuming that it isnt too sticky and comes away whole, the biscuit may resemble a cookie, a jaffa cake or something bigger. Any identifiable food can prompt the addition to the name
sweetcorn bum biscuits are common

hwang cookies are usually found in seattle WA
by undemocraticarse August 25, 2009

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