A mutiny is a revolt, when the led no longer obey the leader. To be mutinous is to behave this way, like when the entire class rises up against a substitute teacher.

Mutinous behavior is largely associated with the behavior of unhappy crews at sea. A mutinous crew can really mess up a ship captain's day, but then again serve as a fantastic source of material for books and movies. There's something inspiring about mutinous behavior — it shows a certain defiant independent spirit that is admirable, unless of course you're the leader being mutinied against.

Definitions of mutinous
  1. adjective
    consisting of or characterized by or inciting to mutiny
    mutinous acts”
    mutinous thoughts”
    “a mutinous speech”
    deserting your allegiance or duty to leader or cause or principle
  2. adjective
    disposed to or in a state of mutiny
    “the men became mutinous and insubordinate”
    not submissive to authority
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