When someone holds in their farts for a t least a week, and then fart, It will blow out your asscrack and you will go through the roof.
Jack: Mrs. Fliff just Died!!
Harry: How?
Jack: Blow Out.
by chess and video games June 26, 2007
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The actual meaning of the word 'blow out' describes the act of letting someone down, or 'blowing out'. This is usually pre-arranged plans that have had the definite go-ahead from a group of people or friends. The act often occurs the day after making plans when one weak individual does the classic first signs of blowing out...turning their phone off.

They turn their phone off thinking that by doing this, all the others who are relying on this man will think it's some kind of rare phone problem and they just can't get through. The truth is far from it, everyone knows the blowout has sneakily turned his phone off. For this man is the blow out king. This man is Chris Singers.
Group "Who's up for Alton Towers tomorrow?"
Man 1, 2, 3, 4 "Yeah sounds good"
Singers "Yeah sounds good I'll come...pick up at 8am?"
Group "Yeah see you then, don't let us down Singers we need you for numbers"
Singers "Lads...come on..would I let you down?"

*Next Morning*
*Man 1, 2, 3 & 4 are waiting outside Singer's House*

Group "Ring, ring, ring, ring"
Singers tucked up in bed "Teee heee, I'm so glad I turned my phone off last night"
Group "Would you believe it...another blow out from the King"
Group *Shouting out the window* "TOOSSSERRR"
by Mr Stab November 24, 2007
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A very cool hair-do, requiring A LOT of hair gel and A LOT of time. Made famous by DJ Pauly D, from the Jersey Shore.
Man, I'm kicking Pauly D style. This is a fucking Blow Out!
by ftp1992 September 3, 2010
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Where the front plug of the (flip flop/thong/jandel/havaianas etc) pops out, leaving the wearer with broken flip flops. Left with nothing much to keep the thing attached to the foot, gravity and a flexed foot must be utilised, leaving the wearer looking utterly ridiculous as they walk.
Steve trips, and pops the plug of his footwear out in the process, "Ah shit, I've had a blow out"
by marsattacks September 14, 2011
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Something that could've been good but used poorly.
a girl seen on the street that could have been worth something. She's a BLOW OUT
by ashley nichole August 29, 2012
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An act of flatulence so extraordinary, one may think the flatulent one has "blown out" the seat of their trousers.
Jesus, Mike, that thing was a massive blow out.
by Ken Whelan November 22, 2003
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To scream at a group of people from a moving car. Followed by a quick getaway only if any member of the forementioned crowd has access to a car. This maneuver is preferrably executed at night to minimize the chances of your identity being known. Many times directed toward homeless tramps/skanks/posers, adolescents, and the elderly. The object simply being to scare the shit out of any unsuspecting person who must taste the brunt of your wrath. Does not have to be a coherent word - it can be any form of loud noise as well, such as an airhorn.
"We took a lap last night and did a blow-out to some people on graham (ave)."
by degowhop May 1, 2007
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