What is Gfly?
Another term for crack cocaine. When someone is flying on the gfly, they mean they are currently high.
This term was inspired by the Jesse McCartney song "Leavin'" where he says gfly, just to rhyme with previous lyrics. No one is sure what he meant by gfly, so people make up definitions to make him look like a terrible person.
"Girl we flying on the gfly, gfly"