noun: (vulgar, slang) A group of males masturbating ("jerking off") together (with or without interpersonal contact).
noun: (vulgar, derogatory, slang) Any group or group activity indulging in excessive mutual praise.
noun: (vulgar, Internet slang) An environment (especially an online community) in which people express or validate a narrow set of ideas and feelings.
noun: (vulgar, derogatory, slang) A situation in which a group of people engage in self-indulgent or self-gratifying behavior, especially by reinforcing each other's views or attitudes.
noun: (vulgar, drug user slang) A person who shares syringes when injecting drugs.
verb: (vulgar, slang) to participate in a circle jerk
