Similar to the Jizz Grenade. While recieving a blumpkin, you shit in a big balloon rather than using the toilet. Then have 6-9 of your friends masturbate to you and your partner and then when cumming, jizz into the balloon. Once the blumpkin reciever is cumming, he then jizzes into the ballon. They then throw it at a victim yelling BOMBS AWAY!!. This makes a prank that a victim will never forget for many many years.

A casual invitation / threat used by an individual that is not afraid of fucking someone up.