A fuapa is the sad-looking thin mustache originally worn by Mexicans. But they are now sported by patheticteenagers who can't grow manly 'staches. A fuapa is usually only on the sides of the upper lip and they should just shave that shit.
Stevie couldn't produce enough testosterone for a realmustache therefore he was stuck with a fuapa.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.