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1.
The sound made by a deadly Tennessee tornado.

It may last a decasecond.
It may be followed by screams from a man.
It may be the worst sound one has ever heard.
"The worst sound Eric Funkhouser said he has ever heard was a 10-second 'voom' followed by a man's screams."

(taken from a news story about April 10, 2009's deadly tornado that struck Murfreesboro, TN)
by BillyJack April 12, 2009
400 45
 
2.
To move quickly though or around.
He will voom past us.
by dude9596 September 05, 2009
106 73
 
3.
The sound trampolines make.
Paul: VOOM VOOM, IM A TRAMPOLINE
John: God I hate down syndrome kids
by MyNameIsNotStan July 22, 2011
0 34
 
4.
The universal word for "Fail" or "Failure".
Jen: "Then he wiggled his third finger."
*Ryan shakes his head*
Jeff: "Man, you voom...!"
Ryan: "Epic VOOM!"
by MDIH May 27, 2010
18 152
 
5.
Adverb, Verb: An expression used in conjunction with the upward and outward swoop of the pointer finger. Commonly used in sarcastic suprise at a ridiculous comment or situation. More often used with a mocking tone, directed at a person who just made a terrible joke, or just told an endless story with no point at the end. Voom has also been used to salvage the forementioned endless story, used as an "ace in the hole." Though this usage of the word is only effective on a select (and easily amused) audience.
"You have High School Musical on your IPod? Voom?? Really?"

by palmerbee July 10, 2008
1 173