A woman is said to be "Airtight" when your lover's anus, vagina, and mouth are all full of penis. - Wadtron

Requires one lady and three men. The lady has one man in her mouth, one in her pussy and one in her ass.

having no weak points; "an airtight defense"; "an airtight argument"

preventing the passage of air.

not allowing air or gas to pass in or out