circle jerk
podstatné jméno
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(vulgar, slang) A group of males masturbating ("jerking off") together (with or without interpersonal contact).
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(vulgar, slang) Any group or group activity indulging in mutual gratification.
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(vulgar, Internet slang) An online community where a group of people form an echo chamber.
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(drug user slang) A person who shares syringes when injecting drugs.