An act performed immediately after sex; moments before achieving male orgasm, the man pulls out and shoots his load into the crevice of the girls ass. Afterwards, he presses her ass cheeks together for an undetermined amount of time. When he lets go, her cheeks will be stuck together, thus forming a sealed envelope.
After mom went to work, I shot my load between Van's ass cheeks and gave her a sealed envelope. She was waddling around like a penguin.
by D.H.G. August 31, 2008
When your girl isnt in the mood and rolls over. well her mistake! She passes out and you proceed to wack off, when you about to nut, you aim right between her ass cheecks. When she wakes up, she will be opening your sealed envelope
by Jay G. January 28, 2004
Sealing the Envelop is to get a female naked and passed out drunk, at which point you masturbate and ejaculate semen down her ass crack using the tip to spread it evenly, then with both hands clamp the cheeks together and wait for it to dry, next day when she wakes up her asscrack will be stuck together.
by R1ftWalk3r September 20, 2016