17b

A phrase that means "Kill our Teammates!" Coined after a whiny group of Halo 2 players started putting the blame on the other teammates for the fact they were losing.

TM1: "You guys fucking suck!"
TM2: "Dude, you're the one that is 1-8"
TM1: "That's because none of you n00bs have my back."
TM3: "Bullshit! 17B!"
*TM1 killed by TM3*
TM1: "What the hell was that?"
*TM1 killed by TM2*
TM1: "What the fu.."
*TM1 killed by TM3*
*TM1 leaves the game*

DH111's Rule 17b

If a person were to exist, this person would know this rule in due course, no matter how ridiculous it sounds. And then it passes through generations until eventually it gets forgotten and discarded.

Father: Hey, have you read DH111's Rule 17b yet?
Jimmy: No, I don't wanna Dad!
Father: Do you wish not to be happy, knowing DH111 is protecting you?!
Jimmy: Okay, okay! Jeez...