a lewdly obscure reference to a woman being good looking. Mint = perfect, box = pussy. "that's some good lookin' pussy!" It's literal meaning is supposed to be akin to "she's hot", or "that's one great looking woman"
"Ya bro, she's mint box", "that's some mint box right there"
by emefbe December 12, 2016
Girl: Did you see that new shirt Pete bought?
Friend: It's not gonna help, Pete's mint in the box ugly
Friend: It's not gonna help, Pete's mint in the box ugly
by poofu's gal August 20, 2007