groo 

A barbarian who is as dangerous as a stampede of cattle...and almost as smart. Along with his intrepid, oddly-loyal hound Rufferto, he roams another time and place, leaving destruction in his wake.

Groo leapt into the fray, with cheesedip around his lips, and turned everyone into mulch.

groo by Icedevil April 13, 2004

Groo 

A contraction of "gruesome", a particularly unpleasant state of affairs, or a particularly nasty job, such as cleaning a sump or a blocked toilet.

David: "I cleaned the grit sump yesterday, David. Your turn today, mate."
David: "Awww... man... That's totally groo...."

Groo by SKinMechanix August 8, 2019

Groo 

1. A suspicious person(s) who lacks awareness that they are the epitome of contradiction.

2. A walking contradiction who lacks self cognitive skills.

You're a total groo dude.

Groo by bilboteabaggins January 16, 2021

Groo 

An online gaming clan, present in many games such as Halo 2, Counterstrike: Source and Guildwars, based in the United Kingdom. Groo pwns joo.

Wierdfish42, Obsequious Wonk, ninjabread, bslsthgrt, Twillly, Gigus, Mr Stabby6, Bubbleshum and Dr Jeffaz are all Groo members. Groopies welcome :)

Groo by Jack Barrington (bslsthgrt) April 21, 2006

groo 

Something one may mumble after undergoing something arduous and/or painful. Also may be uttered if one is not feeling well. Popularized by video game reviewer "Yahtzee" on his web review show "Zero Punctuation".

(After taking a bullet to the chest)
Jimmy: "Groo, my chest!"

(While sick and/or dying)
Baldur: "Groo....."

groo by RandomShellz April 14, 2009

groo 

a shitty come stain on a pillow

'he left a groo on my pillow after he pulled out.'

groo by Allirapasras September 28, 2011

Groo 

A suspicious person(s) who lack awareness that they are the epitome of contradiction.

You're such a Groo dude.

Groo by bilboteabaggins January 15, 2021