Grunt is an acronym used during WW2 for troops who had no formal training, or skills. G-general, R-replacement, UNT-untrained,...GRUNT, as they had no special training, they were given rifles and sent to the front.
Grunts do all the fighting.
by Paul Manning August 06, 2003
little dog-like aliens in Halo that is used as cannon fodder. since they are cowardly from their small size it is fairly humerous to kill them in mass.
I slaughtered a pack of grunts with a single grenade.
by Crazy Carlos February 18, 2004
Term of affection for that tired, filthy, thirsty, hungry, footsore, ripped-trouser, camouflage-painted, lean, mean, son a b*itch who has kept the wolf away from the door for over two hundred years.

US Marines - (03--)
US Army - (11-)
Grunts do it better!

Those fuckin' grunts are cocky.
by Marine Infantry March 07, 2012
The noise one makes when entering work and acknowledging co-workers. The grunt is understood between the two, and is usually stands for "fuck, another day at this shitty place!"
When I saw Fred as I walked into hell...I mean work, we looked at each other and grunted. He must be disgruntled too.
by ocu-pie May 04, 2003
Grunts.... Age of the Corps, 234 years of ass kicking, ball busting, days of death and destruction. Where every day's a holiday and every meal's a feast. We are A.L.I.C.E. pack operated, M.R.E. feed, beer cooled, green amphibious monsters who thrive on war. GRUNTS, Ooh-Fuckin-Rah!!!
Those Marine grunts are some baaaad motherfuckers!
by USMC MARC February 04, 2010
1) grunt (noun), a contraction of 'greedy cunt'

2) to grunt (verb), the act of being definition 1
1) Bale, stop cramming so much swiss roll in your mouth you grunt!
2) Look at Ellis grunting with his four ham and cheese toasties
by LewRob April 27, 2011
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