Gnack Gnack

gnack gnack : melon/skull/head/back of the neck/forhead/face.

-- but only called this when you pull a retarded maneuver to actually fall on your skull..

ie: when i dropped in from the top of the over vert cradle in scarnation skate park i fell straight to my gnack gnack..

by Oneshot Jonny March 25, 2004

Gackt

The worst insult someone may get. It's a combination of every single bad words and insult in the world. If you are ever named a Gackt, better think about how your life is turning out and how you should end it.

"Omg you're so Gackt"

"Geez you sound just like Gackt, but worst"

"you Gackt"

by random432 June 12, 2008

gickin' gack googlin'

kicking back cooling

what you doing my nigga? Oh i'm just gickin' gack googlin.

by Mk September 4, 2003

Gackt Camui

A sexy japanese rock singer; was once the vocals for the famous visual kei japanese band Dir en Grey. He left the band after some incidents happened, and pursued a solo career with his backup band, GacktJOB.

Gackt is the greatest!

by Kacie April 25, 2005

gacky

a nickname for someone that does meth. from the word "gacked"

hey gacky, are you gacked ouy today?

by S. 22nd street October 20, 2006

gack

to kill someone, something or some idea.

imma gack dat be-yotch!

by Nietzche July 1, 2003

gack

the hard crusty substance found on a mans used underpants

Deirdre: jesus john, the gack on your boxers! no way i'm riding you now!!!

by Griffin.vsMcCahill November 18, 2007