Definitionen
1.NounA group of people jerking off (“masturbating”) together (with or without interpersonal contact).
2.NounAny group or group activity indulging in excessive mutual praise.
3.NounAn environment (especially an online community) in which people express or validate a narrow set of ideas and feelings."You should join a circle jerk community if you like this so much."
4.NounA situation in which a group of people engage in self-indulgent or self-gratifying behavior, especially by reinforcing each other's views or attitudes.
5.NounA person who shares syringes when injecting drugs."(Can we add an example for this sense?)"
6.VerbTo participate in a circle jerk.