Top Definition
GAC
GAC: acronym for 'guilty as charged', used on several occasions in 'Cougar Town' series one, episode seven
Jeez just been in the can and there's an eight-ounce floater-who did'nt flush?
A hand went up....'GAC' said the shy girl
von chilli ring 6. November 2009
Group Adding Cunt - One of those ballbags that you see on Facebook that joins literally every single group that's possible, even if it doesn't link to them in anyway; they still join the groups. Each day a G.A.C. will fill up your homepage with groups that relate to nothing.
1. This is probably what a G.A.C. says to them self on a regular basis, "I'm a wanker, let's join every group."

2. That G.A.C. on my homepage is joining all the groups today...again.
von StevieH884422 6. Februar 2010
Gac
Gac can be expressed toward someone or something that's lame, stupid, ugly, etc.
"Bro, gac those highwater pants you got on!"
von kynglyl 9. Juni 2015
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!! >.<"
von FAHKLAH 29. August 2011
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!
von Parker Teresa Azazel Cassie 20. Oktober 2010
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!
von GAC!!!!! 14. April 2011
gac
Acronym for "Get a clue"
user1: omg they landed on teh moon!1
user2: gac
von mememe 20. Januar 2005

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