cockin' out
When a guy gets a boner that shows through his pants (the male equivalent of nippin' out).
Cockin' out in church is considered inappropriate in most parts of the country.
cockin' out
When a guy is showing the outline of his penis through his pants. Kind of like a girl showing her nipples through her shirt (nippin' out)
"Did you see Matt in class today? He was totally cockin' out"