When something is really cool but you really want to go over board so you say radical
That kickflip was radical dude 😎🤙
by Mo$t_wanted_$ELLY April 16, 2017
Radical (rahd eek al) is a word used proficiently and often by Michaelangelo of the Teenage Mutant Ninja Turtles. He is the only one on earth that truly knows its awesomeness, although such scholars as William Preston-Esquire and Theordore Theordore Logan have come close to unveiling the true natures of such speak. The best reason for dividing radical is to make more mini-radicals influence from the beinning radical, in hopes of creating a little radical for everyone. And pizza.
Radical!
by ZtoTheObe April 18, 2011
another word for cool, awsome, wicked, mad. but of course, Radical is Radicaller than those words
Dude 1: you are radical dude.
Dude 2: thanks dude your radical too.
by MegghanBeCool September 1, 2007
Radical, an extreme form of something. To be cool, to be rad

see "rad"
That guitar riff was radical as fuck man!
Dude, this pizza is radical.
by Darrel March 20, 2003
Jim-Do You Like My New Phone?

Amanda-Yeah, Its So Radical
by dingdong123 June 4, 2009