when the pubic hair on either a man or woman spreads past the point of being covered by their undergarments.
"oh my! Did you see that girl at the beach today!! She had such a bad case of pubic sprawl!!! Her pubes were spread 3 inches past her suit, on either side!!!!!"
"Dude, I need to shave my bikini line, I have a serious problem with pubic sprawl!"