The thicker envelope one receives from a school that has accepted one for admission, as opposed to a thin envelope containing a rejection letter.
by ChadwickEsq May 04, 2011
A special type of package used for transporting goods. The goods are inserted into a butthole and then the cheeks are clinched tightly to secure the goods.
John: Hey UPS won’t deliver my package.
Jane: Have you tried a butt envelope? It’s good for illicit goods too.
Jane: Have you tried a butt envelope? It’s good for illicit goods too.
by JTrain69Forever August 14, 2019
by Rorytheracingcar7 November 09, 2019
by pab September 20, 2004
by lotymike July 10, 2009
The dirty envelope is when you're going down on a girl and you use your tongue to go between the anus and vagina...repetitively
by D reazy December 19, 2016
When hooking up with a really drunk girl and she passes out before you cum, turn her over and blow your load all over her ass crack. When it drys, it will seal her butt cheeks together and she will have to pry them open the next day - hence, sealing the envelope.
by Andrew Schwartz October 02, 2003