The act of constantly sharing the same opinion in a forum full of people who are obviously known to have the same opinion as yours, therefor granting you free upvotes to said opinion, while gathering downvotes to anyone that opposes you on the matter

One who has a mania for music.

A group discussion or activity between like-minded individuals that validates mutual biases or goals in a non-confrontational environment.

1.) When a group of males sit in a circle, jerking each other off.

2.) *NOT* when a group of males stand in a circle to jerk off onto a cookie or anything of the sort. That retarded frat game is called "Limp Biscuit"... which kind of indirectly explains why the band of the same namesake is so fucking horrible.

3.) When a bunch of blowhards - usually politicians - get together for a debate but usually end up agreeing with each other's viewpoints to the point of redundancy, stroking each other's egos as if they were extensions of their genitals (ergo, the mastubatory insinuation). Basically, it's what happens when the choir preaches to itself.

4.) A game on MXC that's based on sumo wrestling. Beware the Green Teabagger.

In addition to all the group masturbation definitions,
The Circle Jerks are a hardcore punk band formed circa 1979 in Hermosa Beach, California. It was formed by Black Flag's original singer, Keith Morris, and future Bad Religion guitarist Greg Hetson. They were among the preeminent punk bands of the L.A. scene in the early 1980s.

To kneel in a circle with others and pleasure oneself. Also refers to a pompous, self-congratulatory discussion where little to no progress is made.

Something that is found in most British pubs. Your average circlejerk will sit with his eyes glued to Football on SKY TV and wont even acknowlege your presence if you say anything to him, but if one of his fellow circle members either a mate from work or the pub darts team shows up he will suddenly develop hearing.