A hard ball shaped turd that fires out of the anus at a considerable speed when pushed out of bum crack making a similar sound of a pebble being thrown into a lake.
Oh no!! I just dropped a seriously big bumnut and have just experienced a splash back on the arse hole!!
by Isla HG June 2, 2019
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A piece of harded exrement, that clings to the hair around ones anus. Some bumnuts cling to the hair so well that removing them can rip the hair out from the root which can be painful.
He doesn't wipe his backside, he will get bumnuts.
by Kai_76 February 18, 2008
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"Hey my hen laid a bumnut!"

or

"Hey lets go and have a bumnut for lunch"
by Camac July 2, 2006
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I'm not working with that bumnut!
get lost, Bumnut!
by Kai_76 February 18, 2008
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A bald person. One who has a head resembling a bum.
Who are you calling baldie, you bumnut.
by Darrell Smith June 17, 2005
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an egg, such as the ones falling from avian holes.
Say bitch, go out to the fucking hen coup and fetch some bumnuts for breakfast.
by Krome J February 28, 2004
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