The guillotine choke is a submission technique commonly used in grappling sports like Brazilian Jiu-Jitsu and MMA. It involves wrapping the opponent's neck with your arm while they are in a standing or kneeling position, creating a chokehold that restricts airflow. The technique can be executed quickly and is effective against opponents who attempt to shoot for a takedown. To perform the guillotine choke, the practitioner typically secures the opponent's head under their arm and grips their own wrist or hand. By applying upward pressure while pulling down on the opponent's head, the choke can force a submission. Proper technique and positioning are crucial for effectiveness and safety.