adj. Incredibly sick and twisted. Disgustingly mind-bending. Used outside of extreme sports to describe a bass-line or grouping of psychedelic sounds as heard in drum n' bass, dubstep, and many other genres of electronic music, hip-hop, and rock. Can also refer to visual art that is ground-breaking or brain-shattering, especially in the realm of graffiti and tagging.
Junglist: "Holy shit did you hear that bass-line? How the hell did they do that?! Shit is fucking gnar gnar!"
Head: "Have you seen that burner on 200 south? It's gnar gnar as fuck!"
Head: "Have you seen that burner on 200 south? It's gnar gnar as fuck!"
by Jon Hunstman IV June 29, 2011
Get the gnar gnarmug. A word used to describe something that is favorable or cool. Can be used as an adjective or just as a means of ending a conversation. An alternative to word or any other saying of that nature.
Did you see Louie Barletta's part in Bag of Suck? I think it was pretty gnar gnar.
I dunno man, that ledge looks pretty gnar gnar.
Person 1: Ok man Ill call you later about hitting the park.
Person 2: Gnar gnar.
I dunno man, that ledge looks pretty gnar gnar.
Person 1: Ok man Ill call you later about hitting the park.
Person 2: Gnar gnar.
by Valhallaskates January 21, 2010
Get the Gnar Gnarmug. by tpubs October 30, 2011
Get the gnar gnarmug. by hoipang August 22, 2017
Get the Gnar Gnarmug. Gaffney's Numerical Assessment of Radness
by el capitan de gnar May 30, 2011
Get the GNARmug. 
Gnar is an abstract concept for the shredding of awesome shit. It also means to very cool or some would say gnarly.
by Freeman Morgan November 19, 2014
Get the Gnarmug.