An expression of rejoice used in moments of satisfaction, especially to regard something as amazing. Use of this term
may make 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!"