look up any word, like swag:
 
2.
Adjective; Adverb;
A descriptive word to used to denote something as really cool, fly, hot, awesome; or really horrible, bad, or lame.
Dude, that trick was screwby sick.

Whoa, you lost all that money? Screwby.
by Andrew La Brier August 27, 2008
 
1.
A word invented by Stafford in Generation Kill meaning either "that sucks" or "that's cool".
Chaffin: She's a bookkeeper.
Espera: Cockkeeper.
Stafford: Oh, screwby, dawg.
by MananaFizzBitch August 01, 2008
 
3.
A marine who constantly fucks up...a mix of a newbie, and a screw up.
Yo, that fucking screwby shot himself in the foot today.
by Tkeyler July 30, 2008