The adhearing of slices of American Cheese to the face of an individual who is passed out or asleep. The warm body temperature softens the cheese molding it to the face.
After the party, Khuntar passed out in the chair and awoke with a fresh cheese mask courtesy of his frat brothers.
by RFGetz March 9, 2009
The sexual act of one man squatting himself over another mans face while he is lying down. He proceeds to deficate on the submissive males eyes and then sit on the excrement to spread it on the eyes. He the proceeds to squirt his love juice in the mans mouth to create the Boston cheese mask.
Linsley: "Man, Dom and Kelly came round for dinner and after watching lord of the rings I gave Dom a Boston cheese mask."
by Candy gums anderson May 7, 2010