When someone begins the process of knifing in call of duty with commando perk, but a bulgarian commando will travel up to six times farther and will go through every obsticle in the way of you and your victim. A bulgarian commando can run around an entire building before finishing the knife action. While in bulgarian commando mode, you are invincible.
Person 1: I was just bulgarian commandoed.
Person 2: Yeah, I saw him in midflight, he was at the other end of the map when he started, I tried shooting him but he was invincible.