A straight male (usually in their 20s or 30s) who waxes their eyebrows to a high and well definied arch, thus making it obvious and slightly distracting.
Kim: Hey, did you see the guy Sarah brought to the party?
Lisa: Who, you mean "Sir Wax-a-lot"??
Kim: Hahaha! I was wondering if you noticed those eyebrows too! Doesn't he know only gay men can pull that off?