Top Definition
A person who is a beyond being gumbi/gumby
ie. they are either
a) very weird or strange
b) do strange things
c) make a mistake or mistakes
the plural is gumbii
a) you're so strange that you're a gumbus
b) you're a gumbus 'cos you do weird things
c) you stuffed up you gumbus
by benzag September 18, 2008

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