Short for appearance, used by males to describe other males without being labeled gay. Originated in suburbs of Philly as lacrosse slang before spreading to mainstream use.
One laxer pointing out another laxer: Bro
, that guy has sick APR!
Another guy: Totally man, his APR is off the charts.
Guy to his friend: Nice APR man that shirt is fresh
Friend: Thanks dude you know its all about APR.