Combination of 'fart' and 'dump.' A fump is when you think you have to take a big shit, but when you sit on the toilet to do it, you just let out a huge, explosive fart. Some small, misshapen pieces of poo usually accompany a fump.
by Jeuni October 13, 2012

Fap humping, it was made up in palringo's "official PIMD" group long before people disgraced it with things such as farting on dicks.
Fap humping is you fapping as you hump someone.
Fap humping is you fapping as you hump someone.
Boy: Damn, Aoife was really fumping Tay last night, did you see how into it she was getting?
Girl: Ikr?! And Tay was too drunk to notices she had her hands in her pants!
Girl: Ikr?! And Tay was too drunk to notices she had her hands in her pants!
by Minxy Lestrange January 1, 2012

All of the past definitions are false. There is only one true definition for "Fump" It is a word made up by a child a few months ago and it's defenition is a goblin-like creature with a large head and green skin. The word fump can be used as a verb (to fump) a noun (a fump) an adverb (fumpily) and a adjective (fumpy).
Dude, I just saw a fump!
Dude, I swear he fumped right on the fump!
You fumped SO fumpily.
Well, you're quite fumpy.
Dude, I swear he fumped right on the fump!
You fumped SO fumpily.
Well, you're quite fumpy.
by i SAW a fump December 10, 2010

by lawg December 9, 2008

by T Rastovich September 28, 2003

Deborah has to sit both away from her desk and leaning forward out of her chair because her fump won't allow her to sit otherwise.
by Dirk Diggler February 3, 2003

by fump_man May 15, 2011
