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Definitions by DeadlyAdvanced

A celebratory form of sex. Preformed by two consenting individuals of any sex, race, form or shape. Happens on special occurrences such as Birthdays, Christmas, Easter, Halloween, pay raises, promotions, graduation, etc.
Example 1:
Tim got a promotion at work.

Tim's announces "Happy Fuckmus" and they proceed to have sex.

Example 2:

Person A: How 's Billy been lately

Person B: He's good. Last I heard he's been Fuckmuses.

Person A: DAMN!
Fuckmus by DeadlyAdvanced April 16, 2018