Top Definition
What you should call your work colleagues if they ever have a sick day.
example 1: nice to see that your in today "gravy bum".

example 2: andys not going to be in today hes off sick.
"i bet he has gravy bum"
by yesson20 December 16, 2011
1 more definition
Used to describe the physical appearance of diarrhoea, including its often impulsive behaviour (and/or occurance after eating mcdonald's). Also used as crude humour to describe one's symptoms.
Joey's been knocked down with a case of gravy bum.

I got terrible gravy bum after having that quarter pounder!
by Blank__ October 10, 2008

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