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.
2. That G.A.C. on my homepage is joining all the groups today...again.
by BallBagBaggins February 6, 2010
Get the G.A.C.mug.