The most badass character in the Halo series.
"We've all run the simulations, they're tough, but they ain't invincible. Stay with the Masterchief, he'll know what to do.
by Arori4 August 23, 2010
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The only person more badass than Spiderman, Superman, David Hasselhoff, Megatron, Optimus Prime, Batman, Goku, 50 cent, and Ryu COMBINED.

And contrary to popular belief, he is also a mac-daddy pimp.
Master Chief-"I'm the shit"

Every1 in world-"we know!"

by Cy_Kill October 21, 2007
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when a chick is sucking you off and you are about to finish you back up and run at her while jacking off and melee her w/ said cock and you shoot your load all over her for dramatic effect. Warning may only work on drunk girls, also spraining of the cock may occur when melee'ing bitches. have fun!!!
Sally is giving an awesome Blow J but you think she needs to be taken down a peg or two, so when you think your done you pull out run at her and while shooting said load onto face you melee her as hard as you can possibly trying to cum in mouth as well. master chief
by Jaron Huff December 11, 2007
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The most amazing fuckin' war hero EVER. He completely pwned a whole alien race on a ring planet and can run fast. He also wears some pretty fuckin sexxxy armor. He is the equal to 1337, Pwned, Owned, and anything else in that category.
Geek 1:"Yo (insert name here) Master Chief completely pwnz.
Geek 2(the one who somehow SPEAKS in 1337):"i kn0, h3 i5 p2377y 4w350m3."

2 guys fighting over first player in Halo 3.
Dude 1:"I wanna pwn as Master Chief."
Dude 2:"well im sure as shit not bein arby, he's a gay alien. Im bein master chief"
Dude 1:(while pucnching dude 2 in the face)"fuck u im bein Master Chief. And y shud u be, u didnt even capitalize his name in your quote."
by flamingicicle April 29, 2009
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1. The main character of the first 3 halo games (Halo 1, Halo 2, and Halo 3, respectively). He is an advenced supersoldier, comonly reffered to as a Spartan. Chief's full name is Master Chief Petty Officer John-117.

2. Commonly reffered to as Mastur Ch33f, Master Chief is the parter of The Arbiter (or as Ch33f says, Arbitur). All that is known of him is that He r guy hoo gun t33ch u l3ss0n.
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