A term used to describe a
thrust movement in
bed when you use both of your legs repeatedly in a sexual manner while creating gorilla noises and the flinging of the arms against the chest, which turn the
partner on so much that they begin to imitate the exact action, hence the term "Monkey see, Monkey do."
Prostitute: "Hey
buddy. You lookin' for a thrill? I can leg it up for you if you're willing to pay twenty
extra bucks."
Man: "Leg it up for me baby, be a
beast, roarrr."