Someone who has never fought in their life but has seen combat sports and thinks they're a professional so they write comments critiquing how a fighter should fight. These kinds of basement dwellers are usually found in the YouTube comments of a boxing match, UFC match, kickboxing match, etc.
*Watches boxing match*

John: He needs a more consistent jab, better head movement & keep those hands up. He needs some better footwork as well.

Kyle: Stfu Armchair Fighter
by lil tubby September 5, 2022
Get the Armchair Fighter mug.
A blowhard who claims to strongly support or oppose a cause, but instead of donating their time, they spend it on social media calling out others for not doing more.
"Paul blathers on and on about gay rights, yet he's never been to a Pride Day event. What an armchair activist. "
by Beanwaffle3 July 20, 2020
Get the Armchair activist mug.
If a nerd isnt any of the following:
internet gangster
troll
copycat
poser
dickhead
etc
he is an...
ARMCHAIR COMMANDO!

An armchair commando is a lowlife nerd kid who sits at home shows off his military knowledge and argues about anything that has to do with military and politics involving military and pretends to know more than scientists do about ballistics, measurements, Parts of a weapon and more...
They quickly search through forums, wikipedias for more info and come to their own conclusion or most of the time copy and paste a paragraph from wikipedia
guy1: "m16s are cool thanx to the bullets they use!"
Armchair commando: "NO YOU DOUCHEBAG the m16 was developed BEFORE vietnam war and it uses the 5.56x45 milimeter round which travels around 3000 feet per second and the round disintegrates as soon as it hits rough surface....bla...bla.....bla....making the M16 AWESOME!.."
guy1: "duh thats pretty much what i said
by aJork July 4, 2009
Get the armchair commando mug.
An armchair moderator is someone in a forum or chatroom on the Internet that isn't a moderator of the website, yet acts like one. Sometimes this is abbrieviated to "armchair mod". Usually armchair moderators long to be a moderator themselves, so they try to enforce the rules by telling people who break the rules to stop, and to enforce the rules that are usually already read when you enter the website.
Person 1: what up people
Person 2: stfu n00b
Armchair moderator: please refrain from using profanity or from calling anyone "n00bs", it's annoying and immature.

Person 1: I hate armchair mods
Armchair moderator: blacklisting is against the rules here.
by Superketchupman September 21, 2011
Get the Armchair moderator mug.
Any boss, director, supervisor, or authority figure who attempts to exert direction in a place of business from their home. Also known as, "working from home". This can be done from a number of places including a park, post office, bookstore, or their own home from a blackberry, laptop, or computer. This person usually has no idea how the real world functions and has consultants guiding them through every word of their direction.
My armchair boss is working from home today
by flippedout March 23, 2008
Get the armchair boss mug.
Someone who gets pissed when a band goes in a direction they don't like.
Guy 1: A new lineup?! This isn't the band I remember! FUCK THEM FOR MAKING MUSIC I DON'T LIKE!

Guy 2: Wow, don't act like such an armchair frontman.
by Tully K January 19, 2009
Get the armchair frontman mug.
When you engage in activism from the comfort and safety of your home. Your efforts don't do anything but you think that you're some sort of saint for "believing in the cause".
Look at these kids with their armchair politics. All they do is post little messages on Facebook about bullying. They don't actually do anything about it.
by The Silent Tyger August 8, 2011
Get the Armchair Politics mug.