A sexual move done between a recently married couple. The man takes his middle and index fingers and shoves them deeply into the womans vagina with brute force. He then widens his fingers as wide as he can. It should then cause great alarm and great pleasure to his recent wife. If she screams in pain and agony then they will not last forever. Made famous by one named Harvey Green
"Congrats on the marriage man. You think you will last forever?" "Dude on our honeymoon I gave her the Fickle Finger of Fate. She loved every second of it. We are lasting forever."