Definitions by Jimmy2Shits

Inadvertent Return 

When your partner vomits semen on you immediately post fellatio. This inadvertent return of semen is usually caused by the taste of the seminal fluid, the receiving partner having mental block to swallowing or the giving partner hitting a gag reflex.

I had to change clothes after Sally had an inadvertent return after I came in her mouth. She puked all over my stomach and lap.

Inadvertent Return by Jimmy2Shits March 31, 2022

Gas envelope 

When a male or female licks the rectum and drags the tongue across the entire butt crack. It is often used with a rim job.

She went down on me and licked from my balls to the entire gas envelope.

Gas envelope by Jimmy2Shits December 1, 2021