Someone who lives to work (and usually takes it to the extreme)
"Did you hear Kevin bragging about his 70 hour workweek. Ugh what a grind freak."
colloquial term for "going on" among bros
may further be abbreviated to broin on.
Josh: Hey, what's broing on?
George: nm, brah.
another name for your obliques (and often occasionally your forearm muscles)
josh: Dude, Quinn, nice fishing muscles. Been hitting the gym?
Quinn: kinda...