When an attractive individual (usually female) appears as though they should be participating in sexual intercourse. Female scale ratings usually fall under 8-10, sometimes 7 depending on the day, amount of skin showing and/or alcohol assumption. This is used toward an elite group and should not be thrown around loosely.
Dude 1: "Hey, have you seen Becky today?"
Dude 2: "No. Why?
Dude 1: "pshh. Girl needs banged!"