What is "MQ" in gay culture?

Another term for a man's sexual appeal by another person. Sort of a campy version of a rating system.

Definition

In mainstream life, can refer to Mission Quest, as in a video game or such. Acronym to mean Monkey Queen, a rather ugly woman by definition. Considered to be mean spirited in meaning, and application. Can refer to a person, their initials.

Sexually speaking, it is implying a rating system to the desirability of a man, in how much appeal he may have, versus another.