The use of one's shirt collar, pulled up over the nose and mouth, to protect one from the stench of a recent fart. May also be pronounced "jayse" mask.
by Irrelevant March 19, 2005
by holio March 05, 2008
A term used to explain oral to anal sex in a very passionate sense, as in when you bury your face in your significant other's ass like it's your last chance at survival.
Dude, did you hear about Scott at that party Saturday? He got so hammered that he started gas-masking Jessica for like, two hours! What a legend!
Have you ever SEEN Kim Kardashian? Of COURSE I'd gas-mask her ass!
Have you ever SEEN Kim Kardashian? Of COURSE I'd gas-mask her ass!
by Iguanareah September 21, 2018
by CJR1009 January 11, 2016
When one splatter farts into a hotel provided shower cap and sneaks up behind a loved one and pulls it around their face like a gas mask.
by The Great Mistini March 30, 2015
To shit inside a shower cap, and sneak up behind someone. You then hold them back and put the shitty cap on their face like a gas mask.
by GasMaskOverdrive March 22, 2017
by J.T.000 January 31, 2009