fumb 

A short version for: fucking dumb

Man, what the fuck are you doing, your fumb!

fumb by GMONEY$$$ June 26, 2003

fumb 

fat and dumb at the same time.

"look at that girl over there eating cake and smashing it into her eyes!"
"wow, she's freaking fumb."

fumb by alley&erin August 20, 2006

fumb 

Basically, the epitome of everything that is fail/stupid. It is an emphasis onthe word "dumb", a hybrid between "effing" and "dumb".

Synonyms: fail, dumb, stupid, idiotic, ridiculous
antonyms: intelligent, clever, witty, smart, genious
Related words: dumb, retarded, idiotic, stupid, oafish
misspellings: dumb, fumg, dumn, dumh, dubm

"that new movie 'the last airbender' looks fumb. They casted the characters all wrong."

fumb by ShoopaGull47 December 22, 2009

fumb 

funny and dumb at the same time

how fumb of u!

fumb by FCUKaLot October 14, 2008

Fumb 

To have sex with your thumb

"Then I told the teacher, lady go fumb yourself you fumb."

Fumb by Elthumbo June 18, 2016

fumb 

A synonym for "bang" or "boom", is more sound than word.

Terminator 3:
the terminator hits his newer version and enemy and in that moment some guy says "fumb".

fumb by n2k March 8, 2004

fumb 

Fingering with the thumb.

His dick so small he’d be better off fumbing.

fumb by ivegotu2 August 15, 2020