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 May 14, 2011
Get the Masterchiefingmug. by roflcopterasaurus October 14, 2009
Get the masterchiefmug. "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 24, 2010
Get the Masterchiefmug.