Term used by men assigned to Guantanmo Bay Naval Base to describe the inadequate and below average females assigned there with them. Implies that almost every chick on the island is fuckable because there are so few of them. Anywhere else in the world the same chicks wouldn't even rate a second glance. Ratio of men to women usually hoovers around 80:1 and the cockblocking between men just to shag some below average skank is ridiculous.
Shane: "That babe is a Gitmo Ten!"
Jim: "Yeah, she's only one flight away from being ugly again."
Shane: "I'm goin' for it. Make sure Wade doesn't try to cockblock me."