Russian Divingboard

A lewd sex act between a male and their partner (male or female), in which the partner takes a small, semi-spherical and semi-rigid poop onto the head of the male's penis. The partner then uses one or two fingers to push down on the tip of said penis super fast, being sure to pull their hand away in hopes that the slingshot-like upward bounceback of the penis will fling the feces into his mouth.

(Successful dismount of doo-doo depends on practice; length, rigidity, and elasticity of penis; and the consistency, size, and moistness of feces.)

As punishment, my father would make me perform the Russian Divingboard on him in front of my 32 sister-wives.