A fork of Rural Dictionary
adj. an intense ugly, defiled
Luke to Darth Vader (alternate version) "You're pure dagnasty evil"
Pure and utterly wrong or defiled.
Obi-Wan to Anakin(In "The lost Hope"): "You're just pure dagnasty evil, it's just a FACT!"
adv: really really really cool, or sick.
A: Yo, that beat was dagnasty awesome! B: You know it!