1) An explosion of question, as if one were to make a bomb and it exploded and created questions everywhere, KOSH-BOMB.
2) Another example- A great question
wow, ben, what you just asked was definitely a kosh-bomb!
To play it cool or smooth in a tight situation. Origin: Kosher, Kosh is short for kosher.
Dude #1: Dude, isn't that Kristen coming this way?
Dude #2: Yeah dude, she's smoking hot. What I wouldn't do to get with her.
Dude #1: Dude. Just keep it kosh man or you'll blow your chances with her.