Gronknasti - Noun - I drove by the cell phone store today and saw a Giant Wacky Waving Inflatable Arm Flailing Tube Man and it really made me want to hit up the club and do the Gronknasti.

Gronknasti - Verb - I can't wait to hit up the club tonight and Gronknasti all over my dude bros.

Gronknasti - Adjective - Did you see see that huge dude on the dance floor flailing his arms like a Giant Wacky Waving Inflatable Arm Flailing Tube Man? That shit was Gronknasti.