Chokehold
WordNet
noun
(1) A restraining hold; someone loops the arm around the neck of another person in a tight grip, usually from behind
"He grabbed the woman in a chokehold, demanded her cash and jewelry, and then fled"
(2) Complete power over a person or situation
"Corporations have a stranglehold on the media"
"The president applied a chokehold to labor disputes that inconvenienced the public"