Gas Masking 

To pull a girl's sweet smelling, worn panties over one's head and wearing them around like a gas mask. To Gas Mask correctly, one must pull the panties over the head, exposing one's eyes through the leg holes and allowing the fragrant gusset to rest over the nose the mouth. Gas Masking may be performed by a male or female and may be preferred after certain activities such as running, working out, gardening and other activities that work up an irresistible, tangy smelling, zest.

Stan: Dude! WTF are you wearing on your face? Is that a pair of panties?

Frank: Yea Brrrraaaaaaahhhh!! Muh girl just ran a 5k this morning and I couldn't help but grab them when she got into the shower and do a little Gas Masking. It's irresistible. What a tangy funk she got.
Stan: Sounds zesty Broooohhhhh! Let me mask up when you are done.

Gas Masking by Eaton Holgoode May 9, 2015

Gas Masking 

A variation of ball sacking where you spread your scrotum over your partners face and fart.

He held me down and gas masked me. It was disgusting.

I hear that guy is into gas masking, that is not cool!

Gas Masking by SilentNine May 2, 2010

Gas Masking 

The Art Of Gas Masking Is Farting In A Hat And Quickly Pulling It Over Someone's Face To Create A "mask" Full Of Raw Natural Ass Gas.
(Work's Best When Victim Is Dazing Off)

"Logan Was Falling Asleep Last Night , So I Had To start Gas Masking Him To Wake Him Up."

"It's A New Form Of The dutch oven"

Gas Masking by superpoopertrooper August 26, 2013

Gas-Masking 

Holding in your fart around girls or a new girl you're hanging out with. Once 4 months pass by, it is acceptable to unleash the fury of your anus upon her.

Hey Matar,
Oh key Alek what's up?
I was hanging out with a new girl today, but I had the WORST farts. I was Gas-Masking the whole time.

Gas-Masking by Mel Gibson Killers February 28, 2021

Gas-masking 

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!

Gas-masking by Iguanareah September 21, 2018

Gasmasking 

after sex, the guy stretches the vagina or rectum of their partner over their mouth and nose and suck out their own ejaculate...

When thir long session ended, Leroy pulled Samantha's Vagina over his mouth and gave her the best Gasmasking she had ever had.

Gasmasking by wolfsbane6654 June 3, 2011

Gasmasking 

Covering your nose with your shirt to mask a fart.

After Max released a monstrous and Gervy fart, we all had to start gasmasking or we would have all died.

Gasmasking by dsmueller November 25, 2014