An exclamation proclaiming one's intent to do something of questionable nature for unkown or ill advised reasons. Often used by a group of friends while playing halo or halo 2. Also used to describe the feeling one has about a certain situation, object, or person.
Guy1 *throws plasma grenade on themselves, running into a group of enemies* FOR THE CAUSE
Guy 2"Dude why'd you do that?"
Guy 1 "Dude i dont know, i was for the causing it"
GUy 1 "Dude that test was totally not for the cause, it ranked of uncausefullness."
Guy 2 "Dude thats on the real tip"