They tend to linger on places like twitter, which indicates that these people are GAP's for a living. Once a GAP, always a GAP. Characteristics of a GAP, include good senses of humour and good taste in music.
Occasionally taken the wrong way by some people, unless explained clearly.
Cannot be self proclaimed.
'Excuse me? I mean, I know I have a few gaps in my teeth, but I am getting braces!'
'No, that's not what I meant! You are a GAP! A Generally Awesome Person!'
'Aw, thanks. You too!'
In other words, don't buy their t-shirts.
"So... you're gay and proud?"
"Hey! Hey, everyone! This guy is homo and likes it!"