Practice of filling all 3 orifices of a female by either penis, or objects.
A penis in the ass, pussy and mouth at the same time, or a combination of penis and vibrator/dildo.
My wife likes to be made airtight by having my cock in her mouth, a plug in her ass, and a vibrator in her pussy.
by Slugster August 4, 2005
Whilst in the act of triple penetration, each cock filled cavity seals every possible air path of entry or escape thus causing an immensely pleasurable (I said pleasurable bitch!) sensation for the female recipient, as her body becomes akin to a vaccuum sealed container. Also see, Tupperwhore.
Samantha was absolutely dying to become airtight; she really was. Elaine's airtightedness was the perfect environment for the long-term storage of my balls. "Plug Jessica's nose Jack! She's trying to cheat by breathing through her nose!!!"
by Ryan August 13, 2003
Something that is for certain, something that cannot be doubted or questioned.
My alibi is straight-up airtight.
by Dr Bunnygirl July 20, 2019
noun/adjective/verb : being SO tightly shut that air ceases to exist inside.
She is like fort knox because she is so airtight its not even funny.
by ABomber3113 January 10, 2009
no flaws,lacking any weaknesses
My game is aurtight mark-ass square
by WhiteFolks September 29, 2003
airtighting-the act of a female having sex with multiple males and the males insert their penises into every whole in the females body. (verb)

airtight- the position in which all holes in the human anatomy are plugged on a female during intercourse. (noun)
Rhonda was experiencing unsermountable pleasure as the entire lacrosse team was airtighting her.

The airtight position seemed impossible to get into, but once in it they realized the simplicity of it all.
by TC and Nerf June 26, 2005
The simultaneous penetration of a woman's vagina, anus and mouth.
She is up for any position so long as she gets an airtight seal.
by beanpole July 25, 2006