When a guy sits on your face with his nuts on your forhead and farts real hard, causing your hair, if you have any, to blow back. Leaving behind shards of shit in the persons hair.
"Hey did you hear what happened to Travis today?"
"No, man what?"
"Shawn gave him a Brazilian Gasmask!"
by CRACKERJACK93 September 24, 2011
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When a human of male genitalia precedes to insert the testacies into the mouth, while simultaneously encompassing the victim's nose with one's rectum cavity, and finally proceeds to let off a stinky fart.
After seeing Tim Allen in 'Christmas with the Kranks', it would be awesome to sneak into his house while he's sound asleep, then MANCHURIAN GASMASK him... but that would suck if he bit off your balls.
by Conor McGill April 13, 2006
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Materials Required:
-Yourself
-Cocaine
-A funnel of sorts
-A hooker (preferably sleezy)

Use the funnel to insert the cocaine into your hooker of choice. The lady of the night will lay spread eagle on a horizontal surface and you will place your nose as close as comfortable to her vagina (pussy, hoohah, cooter, vag). She will then queef (see queef) out the cocaine directly into your face holes.
Guy 1: Bro, how the fuck did Chad get herpes in his nose??
Guy 2: The dumbass got a Columbian Gasmask from some skanky hooker from the next town over.
Guy 1: The fuck?
by GingerTopo May 16, 2015
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When you make you hand in a cup shaped position and fart in it, shortly after farting in it you push it in your friends (or someone you don't like) face covering there nose and/or mouth.
It is a very good pranks and makes the victim smell your dirty farts.
This prank was origanally made from a Ukrainian prankster and it is like a gas mask when you put it on there face therefore it is name "Ukrainian Gasmask"
Slangs for this term include "The Dirty Ukrainian" and "Sour Cabbage Surprise"
Matt: Hey Billybob check this out ::gives him Ukrainian Gasmask::
Billybob: OWTF!?!?! that smells like shit!!!
Matt: Rofl lol!!!
by Matt Mandrusiak December 11, 2007
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when a girl is sucking your dick, you sit on the face, and fart rapidly, resemlbling a broken gasmask
Bill - " Jill, why do you look so sick?"

Jill- " Fuckin Felix, gave me a broken gasmask a couple minutes ago."
by dumb fuck ball ass bag April 25, 2010
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When you put your nose in between a female's ass cheeks and proceed to eat her twat out while she is giving you a handjob.
Ronald : "I really wanted to eat this girl out and get a handjob at the same time."

Marty : "Did you put your nose between her ass cheeks?"

Ronald : "Yeah"

Marty : "Dude, that's a German Gasmask"
by Intrutionz October 19, 2009
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a bong most true stoners smoke out of that is made of a water bong and a gasmask
man i like my gasmask bong
by motherfuckingpothead May 6, 2015
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