To exhibit behavior, actions, or state of being in a nature that intertwines traits that would be considered 'fantastical' and 'rad' simultaneously.
The artist's imaginative creations made under the influence of psychedelics were so astonishingly mind blowing, they could only b described as radtastical.
The steam punk space skate opera combined the art of gnarly grinds and other various rad skating techniques with a fantastical atmosphere, compelling story, and an epic sound track; in a way thats won the hearts of the critics as they describe it as "A radtastical ride!"
Fantasy Man, from Noel Fielding's Luxury Comedy, is the most Radtastical fictional Character ever conceived.
Adjective
Radtastical is a combination of Rad and Fantastical. It's used when something is so inexplicably amazing that normal words can't apply. It's origins trace back to a geeky dork who was too much of a weirdo to use normal words.
"Dude! That grilled cheese was radtastical!" "Bro, I love you, but come on. Getting a solo win on Fortnite is not radtastical." "OMG!!! BRAD JUST CHEATED ON MELISSA!!! THAT'S SOOOO NOT RADTASTICAL!!!"