GAC 

abbreviation of the tv show Ghost Adventures refering to the team, Zak Bagans Nick Groff and Aaron Goodwin, as Ghost Adventures Crew.

Yea! I can't wait to see GAC!

GAC by Parker Teresa Azazel Cassie October 21, 2010

gac 

Acronym for "Get a clue"

user1: omg they landed on teh moon!1
user2: gac

gac by mememe January 20, 2005

GAC 

Synonymous with modern day derogatory, foul or vulgar language, signifying someone's distaste for something. Can be used to humiliate, agitate, irritate and maliciously depropriate anything, person or place. Can be used as an Adverb or Adjective to emphasize feeling and frustration towards virtually anything.

What the GAC is wrong with you???
GAC you, you GACing GAC!
You are a GACing Idiot!
What the GAC did Bongwater say?
Get the GAC outta my face, you GACass!

GAC by kc5hwb September 9, 2008

GAC 

Acronym for "Grade 'A' Cocaine"

"This coke is weak. We need to score some GAC"

GAC by JayBeezy August 17, 2007

Gac 

An exclamation to show something has gone wrong.

Jim - "Hey Alan, here is the hyperlink to this cool site about gaming"
Alan - "Gac! You sent me to pregnant people clothing!! >.<"

Gac by FAHKLAH August 31, 2011

gac 

acronym used by the military meaning ground assault convoy

(noun) a series of military vehicles lined up to go somewhere for a mission especially overseas.

"hey private you're riding in the gac to baghdad"

gac by caffeine22 September 28, 2005

Gac 

Acronym for Green Apple Child. Can also be used on National Gac Day, which is the day where we celebrate the Green Apple Child. You can honor it by wearing a Green Apple Child on your stomach.

-Why are you wearing that green thing on your stomach??
-It's Green Apple Child Day!!! Happy Gac Day!

Gac by GAC!!!!! May 4, 2011