guff monkey 

one who frequently farts

You stink, you filthy little guff monkey

guff monkey by pantsonhead December 23, 2002

guffmonkey 

An individual who spouts utter bollocks all day long, but does it in a way that's marginally funny. They generally have no idea that they are full of shit. They're just stupid.

Tom's an absolute guffmonkey.

guffmonkey by Greedyjames May 24, 2019