A choke hold, or stranglehold, is any type of unarmed strangulation technique used to submit an opponent or incapacitate a foe by restricting their airway (choking) or blood flow (strangulation). Choke holds are common in martial arts such as judo, Brazilian jiu-jitsu and sambo.
In judo these are known as shime-waza, and were originally codified by Kano Jigoro and the Kodokan judo school.
For Danbooru purposes, choke holds are to be tagged strangling, not choking on object.
This tag implicates strangling (learn more).