After sex when the dong is between flaccid and hard, still wet with vaginal secretions, the dong is slung across the female's face, making a "flop" sound.
I dong flopped Veronica right under her nose so she could smell it all day!
The 200 somethingpoundGuy who makes a mark for only doing BELLY FLOPS OF THE "DIVING BOARD" and piwers through the Red marks he gets and does it more than twice. He also gets praised for doing the Belly FLOPS and lowering through the Big RED MARKS he gets.
Did you see Belly FlopMan he is being so awesome, he's doing BELLY FLOPS for our amusement I love him. I wish I had the coujrage and confidence he has.