by Ahhlex September 1, 2004

A nick-name used for a weird person.
by had180603 December 11, 2016

Usually stated by the infamous MrRret, a well recognized Counter Strike : Global Offensive player, also in fricca clan. This usually means "On God" or "On Momma". You can use different uses for this by saying something like "On Gillgly Willgy Mesh" or "On Gillygill-gilly mesh broski"
by GimyHima February 11, 2023

Gilgamesh was an historical king of Uruk in Babylonia, on the River Euphrates in modern Iraq; he lived about 2700 B.C. ...For ur info he's not a gimp!!!! Read some books:)
by Grabaka November 18, 2003

An adaptation of the Epic Of Gilgamesh hero, meaning something along the lines of mega awesome or pwnage.
by lights.off.at.graceland July 3, 2007

Noun: (alternatively Gilga)
Gilgamesh was the name of a World of Warcraft avatar played by a wife who was using the VoIP service Ventrilo to cyber with the male players of other avatars in her husbands guild. When the husband posted this information to the WoW Onyxia server forums, the entire ordeal engulfed the WoW community over the weekend of 8/10/2007 before ultimately being quelled by forum moderators. There is some reason to believe the entire story was faked, however, the name Gilgamesh has become synonymous with cheating, loose women in the WoW community.
Gilgamesh was the name of a World of Warcraft avatar played by a wife who was using the VoIP service Ventrilo to cyber with the male players of other avatars in her husbands guild. When the husband posted this information to the WoW Onyxia server forums, the entire ordeal engulfed the WoW community over the weekend of 8/10/2007 before ultimately being quelled by forum moderators. There is some reason to believe the entire story was faked, however, the name Gilgamesh has become synonymous with cheating, loose women in the WoW community.
by Gonzo Joe August 17, 2007

by Elitist February 5, 2004
