When two men are having anal sex (back to chest) and the man penetrating reaches around to massage the balls of his penetratee, so they tuck into his abdomen; he then rubs down/up the penis, into the scrotum, as if it were some vagina and clitoris.
When my girlfriend cheated on me I left her for the cutest Fruit Roll-Up from way back when.
A completely arbitrary and pathetic way to excuse any sort of behavior. By defining an action or ideal as "how you roll", you make whatever you're describing perfectly acceptable to any and all audiences. After all, it's how you roll.
Girl: Hey, what's wrong with you, grabbing a stranger's boobs in public?
Guy: Sorry, it's just how I roll.
Girl: Okay, that's fine then.