A fork of Rural Dictionary
Its stupid, no normal people say this, its laughable at best, not insulting at all. Nerds of the fifties and 60s said it. Watch twilight zone, u will hear it in damn near every episode. Only they say to leap at the moon.
But ive got to see you, helen! iblive u! Randy, I've told u before. I'm not interested! How bout u take a flying leap at the moon!
simply, this phrase is a "nice" way to tell someone to take a flying fuck to a rolling donut, take a flying fuck, go fuck yourself, get lost, kiss off, go suck an egg, go fly a kite, etc.
Schoolyard bully: Gimme a quarter, chump! Other kid: Take a flying leap of a galloping goose!