Kaboomarang 

When a man and woman are having sex, and the man picks the woman up via his penis. He then spins around and slings her into a nearby wall, tree, door, etc. and yells "kaboomarang!"

Kaboomarang! How does the wall feel, trick?!

Kaboomarang by ecstasteve October 1, 2009

Kaboomerang 

ka·boo·mer·ang  Show Spelled kuh-boo-muh-rang

–adjective

1. characterized by or proceeding from a stupid action.

2. something that comes back to bite one in the ass.
3. has the appearance of something cool, but ultimately turns out terribly for the initiator.

–noun

7. Informal. a kaboomerang.

Man#1: So, then I got so mad that lit my shirt on fire to prove he was wrong.
Man#2: And how did that work out for ya?
Man#1: ...had to go to the hospital.
Man#2: Well that sucks.
Man#1: Yeah, it was a total kaboomerang.

Kaboomerang by Chiggety May 2, 2010