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1.
A short version for: fucking dumb
Man, what the fuck are you doing, your fumb!
by GMONEY$$$ June 26, 2003
20 11
 
2.
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."
by ShoopaGull47 December 22, 2009
5 4
 
3.
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."
by alley&erin August 20, 2006
9 13
 
4.
funny and dumb at the same time
how fumb of u!
by FCUKaLot August 19, 2008
4 10
 
5.
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".
by n2k March 08, 2004
3 11