1. The act of using a RIOT shield in the game Modern Warfare 2, usually as a team, with the clan tag "RIOT" players work in teams of 2 with each other
2. In person, RIOTing is when people put one arm out parralle to their body and bump into each other, aka RIOT sheilding but with bodies
1. "Hey, want to do some RIOTing tonight?" "yeah sure just let me change my clan tag first" "LETS GO!"
2. "Hey asshole, lets RIOT" "sure man!" *both pretend to bring down RIOT sheilds, start to bump into each other* "LETS GO!"