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.
by helllloooooo June 23, 2011
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!
by BITTERwork April 23, 2011
Another Word for Masterbation.
"He was Master Chiefing it all afternoon."
by Bobby Bobbleston October 20, 2007

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