Protesters formed 'a human chain' [=they stood next to each other with their arms linked] around the ancient tree to prevent it from being cut down.
In the United States, the President as the commander in chief is at the head of the military 'chain of command'.
I thought he really won the lottery but he was only 'pulling my chain'. [=he was only playing a joke on me]
(..) Man she's tough. - What? You gonna hit me now? That'd pretty much complete the picture. You need to keep your bitch on a leash. Put a choke chain on her and yank that motherfucker. Oh, of course, right to the stereotype thesaurus - Oh yeah Call me a whore and a bitch in the same (..)2008 Gran Torino