A move used in Star wars battlefront 1 and battlefront 2 by the sneakiest players in both games
Zanny: I'll go for the master flank
His Friends: you son a bitch, I'm in
In a video game, when someone sneaks through/around the entire map in order to get behind the other team, often eliminating many people because no one notices someone has gotten behind them until they are not paying attention
Paul: Damn our team is getting gunned down hard, time to go for the MASTER FLANK
*paul then sneaks through the map and gets 30 kills*