Definition from Wiktionary, the free dictionary
- (vulgar, slang) A group of males masturbating ("jerking off") together (with or without interpersonal contact).
- (vulgar, slang) A metaphor for any group activity performed for personal gratification.
- (drug user slang) A person who shares syringes when injecting drugs.
- (Internet slang) An online community where a group of people form an echo chamber, either intentionally (as satire), or unintentionally.