Master Chiefing 

Smoking so much weed, that you are prone to passing out.

Last night me and a buddy were totally Master Chiefing when we hit that bong.

Master Chiefing by helllloooooo June 23, 2011

Master Chiefing 

Another Word for Masterbation.

"He was Master Chiefing it all afternoon."

Master Chiefing by Bobby Bobbleston November 5, 2007

Master Chiefing It

Attempting to be a one man army.

"Dont you dare go Master Chiefing It." , " That retard just tried to Master Chief It."

Master Chiefing It by Future Ninja Turtle September 19, 2009

Master Chiefing It

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

Master Chiefing It by King Ceri February 26, 2011

masturchiefing 

The act of pleasuring one's self with the intention of sexual gratification while playing the Halo series.

Halo Fanboy #1: "Hey, wanna troll on a Playstation website?"

Halo Fanboy #2: "Wait! I'm not done masturchiefing yet!"

masturchiefing by D4ng3rM4n January 5, 2012

Masterchiefing 

Verb; When one breaks up his or her weed on the case of any game in the Halo series. i.e. Halo, Halo 2, Halo 3, etc.

DOOOOOOODE, we totally broke up some DANK ASS SHIT on Halo 3 last night and we were Masterchiefing the fuck out of it!

Masterchiefing by BITTERwork May 14, 2011

Mastercheifing 

Verb-
A. Mastebating while playing halo (1, 2 , or 3, because wars sux).
B. owning at halo.
C. being epic in any way, shape or form.

in-game kid: Hay Guyz im mastercheifing it up in my pants!
other kid: GROSS!

OMG i am SOOO mastercheifing *killionare*

im soooo mastercheifing *<<< chuck norris talking, of coarse*

Mastercheifing by the cheifer November 27, 2010