An act performed by two people. Step one: One person grips another person's wenis firmly. Step two: Other person tries diligently to "buck" the other person from his wenis.
Friend 1: "Hey! The wenis rodeo is coming to town!"
Freind 2: "Oi! Let's go at it."
(Friend 1 grabs Friend 2's wenis. They proceed with the rodeo)
The term weenis refers to the skin surrounding the elbow. A weenis rodeo is a game in which a contestant grabs on to someone's weenis, and attempts to hang on as that person jerks their arm up and down in a hammering motion. A third party judge counts the number of seconds before the contestant loses grip of the weenis.
Jamal held on to Travis' weenis for dear life, but it bucked and kicked and he lost control after 7 seconds. Anothermediocre cowboy in the Weenis Rodeo.