When you are fucking a girl in the ass and she clenches her cheeks together and you can't get your dick out.
Female:"I got you in a booty-trap"
When a female is assterrific, and a little thickalicious, and has a behind that acts as a lure, the man being the booty bait, when finally he falls for it.
friend: how come you never come out with the guys anymore
dude: she's got me in her booty-trap