Floppy Frog 

The act of placing ones flaccid penis upon your best friends cheek, then jiggling it around.

Similar to "the helicopter"

Dude, I was so wasted that I gave Rustin a floppy frog. Bromance for life

Floppy Frog by DJFLOPPYFROG July 26, 2011

Flappy Frog 

Having sex with a unerected chode and usually invovles semen and a frog or toad.

Im so jealous that kid got a Flappy Frog in the swamp last night.

Flappy Frog by Wolfemanpaco February 1, 2010