A Testarodeo is where two or more guys loaded with testosterone and booze square off in semi-serious hand-to-hand combat with the intent of establishing dominance in the group.
*Note: Often occurs on a mancation.
Roleplaying can be involved, thus there will be a Bull, a Bullfighter, and off to the side as a Referee, a Rodeo clown (preferably one of those midgets from Jackass.
**This behavior often results in mild to massive hotel room property damage.

When you eat dirt for the first time and leave your family to build a shack in the woods