A noun describing the round that will determine who is the best player in a video game be it Super Smash Bros. Rocket League, or any competitive game. The winner of the Champion's Round is the champion for the day and gets bragging rights.
John: "Time for the Champion's Round, monos. Prepare to get whooped."
Anthony: "Ok."
*After the Champion's Round*
Anthony: "I beat you, John! I am the champion."
John: "Whatever, you know I could've whooped your butt if I was actually skilled at video games."