1. Melbourne/Australian slang for a GHB overdose. Can vary greatly in severity. Passing out uncontrollably and loss of motor skills are the most identifiable symptoms of a non-serious case. More serious cases involve vomitting and loud indecipherable yelping or yelling. Can result in death.
2. Someone that frequently overdoses on GHB.
1. Carl: Did you see that dude blowout outside.

Paul: Yeh. What an arsehole.
2. Frank: Have you spoken to Sam?

Sean: No, he's a filthy blowout.

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A hairstyle worn mainly by young Italian-American men. Sideburns and the nape of the neck start at a "1" and gradient speedily up to a full-blown Itlian-American Afro. Hair is jelled into a spikey-look and pulled from the head to maximize height and width.
Italian American #1- Aye, nice blow out
Italian American #2- Yo, props. Took me like 45 mins to get it right. It's a one on the bottom.
Italian American #1- Who did it?
Italian American #2- Joey's Barber in Morris Park
by TreDay November 12, 2005

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Melbourne, Australia slang for a GHB/GBL (juice) overdose. Often comes with involuntary sleep/passing out for hours, involuntary movements, sex with anythng or anyone, extreme horniness, moaning and groaning, dangerous driving and dancing like a fuckhead whilst touching oneself. The person "blowing out" will be unable to comprehend or understand you telling them to "calm down" or "stop it" and will continue to blow out until he GHB effects wear off.
"I can't believe she pissed in the middle of the road"
-"yeah she's a dirty blowout"
by 3ml_Charge November 21, 2010

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Occurs when stretching of the ears with gauges. It is the extra flap of skin that is created when either going up sizes too fast or when you skip sizes. Blowouts can heal, but it requires the plug to be taken out. Most people think they've gotten a blowout, but in reality they've ripped their ears. Ripping of the ears may have skin discoloration around where the ear was gauged. A blowout mainly happens when the skin does not easily stretch and is forced out through which ever way you're stretching your ears. This excess skin may eventually deteriorate. The results of a blowout (depending on the size) may look unpleasant when the plug is not in.
Person 1: That man's lobes are huge!
Person 2: He's most likely going to get a blowout soon.
by renizzler June 15, 2009

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(OIL INDUSTRY) a disaster consisting of a rupture of the pipe carrying oil away from a wellhead. Basically, when oil coming out of the ground through an oil well is released into the open air, or pours into the ocean.

In 1991, after Iraq's invasion of Kuwait was repulsed by the US-led coalition, the retreating Iraqi forces used incendiary explosives to blast open and ignite the streams of crude oil coming from Kuwaiti wells. This was the largest mass blowout in industry history.
The Deepwater Horizon blowout is incorrectly called a "spill" by many news outlets. It is not a spill, it is a blowout.

Oil wells, particularly those drilled underwater, are required to have a functioning blowout preventer. The one of the Deepwater Horizon was made by Halliburton and was defective.
by Primus Intra Pares July 15, 2010

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when you wear out a hole in your kicks (shoes).
aw crap my fav pair of airwalks had a blow out!
by SexyTexan January 05, 2012

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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 Artist November 01, 2007

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