A picture, usually mental, that a man has of a woman's boobs. Often very pleasing to picture, but only so many can be stored in a mansmind at a time
Barney: "Of course bro, you can't get over a woman if you still have mental pictures of her boobs, or B.PEGS"
Marshall: "Well its gonna take a while, because I've got a lot of those stored."
Barney: "And that is why I brought you to a strip club."
Reverse pegging is a sexual act in which a man wears a strap-on harness to penetrate a woman sexually (vaginally or anally). His penis is not used for this act and may be confined in a penis cage or may simply not be used.
Let's lock you up and do some reverse pegging tonight babe.