The etymology of this word derives from
two other words "deliciously" and "thud," as in what happens to women breathlessly gazing at Clay Aiken, then fainting away. This word was born on various Clay Aiken message boards in the Summer of '03, AKA "The Summer of Clay."
adv. That guy is thudaliciously gorgeous.
adj. Watching him shake his booty was thudalicious.
interj. Thud! (Picks herself off the floor and continues to type after viewing thudalicious picture of Clay.)