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8.
Those annoying little fucks in Halo.
Try not to waste your shotgun ammo on Grunts. They're not worth it.
by Kevin Martin May 07, 2004
 
9.
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
 
10.
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
 
11.
To emit excretement.
"Wait up, I have to go take a grunt."
by x January 22, 2003
 
12.
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
 
13.
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
 
14.
To break wind. Slang term from England.
Um.. Pete, have you just grunted?
by ManofG November 30, 2007