Used by rap group OFWGKTADGAF. It is "Golf Wang" backwards, which they call themselves sometimes instead of "Wolf Gang."
Person 1:"Wolf Gang all the way!"
Person 2: "No, it's Golf Wang now." "
Person 3: "Flog Gnaw, bitches!"
A word Tyler The Creator used to leave the impression that he's cool, and indeed not a dyke according to Twitter.
"I am not a dyke, flog gnaw."