+Circle Jerk

Someone who somehow ends up in one of your G+ circles, then starts a flamewar in what you'd thought would be a non-controversial post.

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

Responding to every status update/photo/like/tweet by your friends, and them doing the same for you.
Also applies when the update/photo/like/tweet is intended purely to get the online attention you crave.

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.

1. A term often used to refer to when a group of people attempt to debate a topic, but it is taken over by people who all agree with eachother trying to boost their egos.

2. When a group of men jerk eachother off.

When two or more guys all jerk off together

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.