Murryfuck (term)

Murryfuck is a demeaning term formed by swapping two words on the anthropomorphic MUCK FurryMUCK's name.

Use and history
It is often used disparagingly to represent the supposed and confirmed sexual activities that go on there, versus other, perhaps more serious role-playing-intensive MUCKs.

This word seems to have originated around the time of the Wired article Johnny Manhattan Meets the Furry Muckers, although its use has declined since.