radical 

A political extremist, typically a far-leftist such as a communist, anarchist or revolutionary. The conservative equivalent is reactionary.

The Jacobins were the radical left-wing of the French Revolution who instituted the Reign of Terror.

radical by Anon989989 March 15, 2016

Radical 

Adj: radical usually is something that was done that was so awesomely amazing and gnarly. It can also be someone that is overly cool and gnarly, like McRadly.

Sir-"have you met Ashly "
Other sir-"yeah dude she so radical!"

Radical by "Burger boy" July 11, 2016

radical 

80's term for "too f*cking cool" , dude :.

BBG , is too radical

radical by lnstagram November 17, 2016

Radical 

A nineties word to define something totally awesome.

Often also used as a slang word.

Dude, that game we played last night was totally radical!

Radical by Some weird gal February 18, 2017

Radical 

What you’d say when your a fucking cool ass skateboarder or a wannabe skateboarder

Bro, fucking radical.

Radical by 420PinkandGreen December 6, 2017

Radical 

Radical , considered cool or liked upon by many. Most commonly used to describe something convenient or ever the more useful when talking to friends about something good

This definitely has to be one of my favorite summers yet. Its been super radical

Radical by Paul Rogan Author/ Novelist March 13, 2019

Radical 

1. A word mostly said by people who are still in Myspace that shows how much of a virgin you are

2. A word meant to say something's cool but in a more hippie way

James: "Hey Chad, Look at this cat playing a piano!"

Chad: "That's Radical"

*James blocks and unfriended Chad in every social media network*

Radical by Alternex July 11, 2019