Moldy Vag
One of the few symbols used for marking in World of Warcraft. It was aka a green triangle, but Moldy Vag is much better. The word first came into use while  Moocat, a raid leader and guild officer of a World of Warcraft guild (recruiting closed, HA) used that name instead of Triangle while marking sheeps.
Oh that Illidari Boneslicer is such a moldy vag.

I hear Javanaut's mom has a moldy vag, with a single hair too.

Moocat, you're such a moldy vag!