When one Bro jumps on the back of another Bro unexpectedly then begins screaming "BRODEO, BRODEO!" acting as if they are riding a bull in a rodeo. The goal is to stay on the bro for at least 8 seconds or longer, while the bro being rode is tring to get the bro rider off. Just like in bull riding, in bro riding you use only one hand/arm to hang on. similiar to Icing in the way this is done between "bros"
(Bro Rider often acts like a cowboy while participating in a brodeo)
Bro Rider: "BRODEO YEE HAW, BRODEO! GET 'EM PARTNER!"
Bro: "no way you were riding more than 8 seconds bro"
Bro Rider: "some salt?"