The act of a male masturbating in the front passenger seat of a female's car, in the hope that she will join him. Usually a last act of desperation on an unsuccessful first date.
1) To remove the rear pin on an M16 rifle, allowing the rifle to fold open to reveal the internal parts. This is similar to how a double-barrel shotgun folds open for loading.
2) To explain something in a very simple and clear fashion.
3) To bend a standing woman forward for sex.
1) "Take your weapon and break it down shotgun-style for inspection by the armorer."
2) "Look, let me break it down shotgun-style: the colonel thinks your scenario is shit."
3) "As soon as we finish up this op, you can all go home, grab the little lady and break her down shotgun-style."