When a girl has her each hole filled with dick or sex toy. The most popular airtight position is with three dicks, when one is inside the girl’s pussy, another one is in her ass, and the third one is in her mouth. This double penetration (DP) plus blowjob position is usually performed in foursome sessions or gangbang orgies. You can see airtight in a little bit hardcore version with three BBCs, which is usually the maximum of dicks the girl can take at once.
Common misspells: Aitight, Aittight, Airtihgt, Aortight, Airithgt