Go Fuck Yourself,Good For You, God Forgives You. G.F.Y. always means Go Fuck Yourself but the other two options can be used if you're scared to tell the truth or if you're talking to your mother
Corporate speak for Go Fuck Yourself. Corporation frown on their employees passing curse words back and forth in email so just tell someone to G F Y in the body of the message. Often used in conjunction with GHY (Go Hang Yourself). You would use G F Y and G H Y when telling them to Go Fuck Yourself just isn’t enough.