An adjective, to describe an object or event that is both Radical, and indeedspectacular. Such things would include firework-powered skateboards and Puppies with jetpacks.
Hey,Joe,did you see that racecrash on TV yesterday?" "Sure did, Bob, it was totally radtacular!
An expression of rejoice used in moments of satisfaction, especially to regard something as amazing. Use of this term maymake someone, as a side effect, look like a tool.
Theo tried telling Eliza that her hair was radtacular, but she told him to fuck off; he was shaking his hips like a douchebag.
"That's so spectacular, it's rad and hipster. That's... you guessed it! Radtacular!"