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2.
A combination of the words "Mad" and "Radical".

Mad + Radical = Madical.
Hey Corey, your friend Chad is totally madical.
by Dr Robert Maric June 24, 2006
 
1.
something you call some one who is mad rad ussualy used by skaterz
hey that trick was madical
by Mr. Steezy April 09, 2006