What does gay X-Appeal mean?

An abbreviation to say a person has 'sex appeal'.

Definition

Rather a campy usage, to claim a masculine sex appeal. Such as like saying 'he's got x-appeal' instead of just coming out and saying he's sexy or something similar.

Common other terms, meaning the same, would be Beefcake or MQ. MQ being the shortened version of Masculine Quotient, or sex appeal.