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2.
A term used to describe a person who acts like an activist, but from a metaphorical armchair — i.e., from a mostly or totally inactive, theoretical position.

Inherent in the meaning of armchair revolutionary is the idea that the person knows that their ideas require them to be physically involved in political struggles, but that instead the person chooses to be intentionally ignorant or dismissive of real-world issues and problems, in an attempt to continue believing in the false reality their views create. In this way the armchair revolutionary is often regarded to see the world in at least a quasi-idealist manner, i.e., one relative solely to his or her own perceptions, rather than bothering with what s/he should really do — to absorb the physical and practical reality s/he would be compelled to see around him/her if s/he stopped the alleged "political posturing" and became an activist in actual political causes
Jessica: The soup kitchen in our town closed down but we don't care! KONY 2012 WILL CHANGE THE WORLD!

Andy: Posting Kony statuses still? You're such an armchair activist.
by comealongpond2050 March 09, 2012
 
1.
One who sits in their armchair or desk chair and blogs or posts Activists issues on facebook without ever really doing anything about said issues or exercising any form of activism as it would require that person to actually leave the armchair.
Jackie sure can talk up a big game on the issues, but she's not going to do anything about them -- she's an Armchair Activist.
by eshook February 19, 2011
 
3.
The less witty man's version of the word slacktivist
Old man: Look at this kid on Facespace, he's such an armchair activist.

Kid: Do you mean he's a slacktivist? What the hell is an armchair anyway? Is it a chair made out of arms?
by Big Dick Harry June 18, 2012
 
4.
Politician comfortably seated within a position of power that makes decisions and policy for everyone to follow but themselves.
Congress is nothing but a bunch of armchair activists railing at one another and causing hell for the common people.
by Sythrael September 23, 2011
 
5.
A so-called activist who thinks he is helping towards a good cause by making a topic famous via blogs/social media.
"Forward this link to help breast cancer!!!!"-common saying by an armchair activist.
"Copy this message to help prevent HIV! Look I'm an activist xoxo."
by jorit March 07, 2012