a term mostly used to describe a white professional athlete who lacks a discernible skill but makes up for it with passion and fire. Often the athlete is undersized. Comparable to "Bulldog" or "Sparkplug." White people love to overvalue these athletes contribution to their respective teams and always include a reference to intangibles.
I know that in 2006 Albert Pujols hit like 50 home runs, but where would the cardinals have been without that grindy David Eckstein.
irritated, annoyed, pissed off, so upset your jaw hurts
Miss Thing got me so grindy when she couldnt stop talking about herself... I had to leave the room!