Green’s Dictionary of Slang

(US teen) bad.

1962		A. Burgess ‘Gloss. of NADSAT Language’ in Clockwork Orange n.p.: Others [i.e. coinages] are produced simply by schoolboy transformations: ‘appy polly loggy’ (apology), ‘baddiwad’ (bad), ‘eggiweg’ (egg), ‘skolliwoll’ (school), and so forth.
2002		DVDangle.com 🌐 This is the story of a malchick (boy) named Alexander Delarge, who is desperately attempting to become a chelloveck (man). Unfortunately for little Alex, he’s the leader of a gang. That’s not the way to grow up, or is it? He’s been baddiwad, and something needs to be done.