When, in a video game, one runs at full speed to avoid the effects of gunfire and explosives, specifically area of effect explosions.

The theory goes, that if you Master Chief It with enough skill, no one can touch you until you slow down, hesitate or stop going in a straight line.
What the fuck dude, I couldn't shoot you for shit?!

Not surprised mate, I was Master Chiefing It like a bitch
by King Ceri February 8, 2011
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the man who gave Hitler the idea to start his own genocide
Hitler-"I see that Master chief can kill an entire race, I bet I can to and get away with it! its brilliant!"
by Th3on3andonlylov3r March 25, 2011
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a boy portraying the character off of the halo trilogy. this boy portrays master chief only when he is in the act of the giant circle.
"Master chief what is taking so long?!?!?!"
"I'm loading my plasma grenade if you know what i mean."
"Ooooh you a kinky bitch master chief"
"SHUT UP BUTT PIRATE, MASTER CHEIF IS MINE!!!"
by Banana Hamikk May 11, 2008
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a faggot guy wearing a green costume. Everything is fake and all u losers out there obsesed with the game just face it, hes a faggot! he has a girlfriend who isnt even real, named cortana, who lives in his head! He's a fag.
Hey did u just see the pictures of the Master chief i took with him having sex with cortana?!?!?!?!
by walmer March 7, 2005
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An often overused antic in modern culture where one man (or small group) face incredibly overwhelming odds and win. Generally only met with "dude" and "sick" from bro's and frat boys, and met with chargin from people with brains.
"Dude Master Chief just jumped out of a space ship and blew up that other ship. Then he single handedly killed 4.5 million aliens with his bare hands... sick."

"That end fight in Saving Private Ryan was such an obvious case of Master Chief Syndrome I'm suprised anyone can keep a straight face."
by Jackel_623 February 1, 2010
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some kick-ass soldier of an awsome game which is awsome and yeah ummm... i like penguins! and he is a kick-asser of super assers in the fucked up galaxy we like in! Masterchief rox but his lesbo pal named cortona is well a lesbo and sucks other lesbos boobs.
master chief what a sexy beast of a soldier!
by walmer April 18, 2005
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