One who excludes themselves from a social activity in favour of another activity. Usually accompanied with the adjective 'dirty'.
"Nyssa, are you still coming out with me on a pub crawl?"
"No Adam I told you I was busy."
"No you didn't, you said you'd be free at lunchtime, you dirty blowout."
by permanentquandary December 27, 2011
Generally following a moist, wettish bowel movement, wherein the subject or victim proceeds to wipe the soiled anus, and the toilet paper rips or slips out of place, exposing fecal matter to one or more bare fingers, often times covering said fingers with odorous excrement. Although everyone who experiences this messy situation has the option to smell aforementioned fingers, it is a proven fact that more than 90% of subjects do indeed smell their soiled finger(s).
If I used a larger wad of toilet paper, I wouldn't have experienced this three-finger blowout!
by Diesel Train December 09, 2012
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
When a fake tit deflates or pops and loses the silicone or saline...
Jenny felt lopsided and realized she had a blowout - here fake titty deflated.

Hey babe, your left tit looks small - did you have a blowout?
by B. Hanback January 29, 2010
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
when a female inserts the penis in the mouth to perform falacio she exerts from her lungs a thick indo cloud onto the penis creating massive smoke clouds upon the males pecker and balls.
man sherry gave me a blowout the other day and when she blew out man i realy blew in..
by tymatdrew October 15, 2010
When a girl orgasms so forcefully that the hydraulic pressure of her ejaculations renders you unable to maintain penetration. The girl herself is a gusher.
I would have stayed over, but when she got off we had a blow-out which knocked me to the floor. So I just put on my pants and left.
by Jickety March 19, 2008

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