Taken from Lady Gaga's VMA award speech, "FGATG" stands for "For God and the Gays".
Use it to show that you support gay rights, love the gays, or are ~totally gay, yew guise~!
"FGATG!" - Our Lady of Gagalupe
"Westboro Baptist Church sucks, I like dick, FGATG." - typical ONTD post
"I hate skinheads and neo-Nazis. FGATG!" - trolling a Skinhead.