This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Very bad; villainous.

adj. Fine, excellent.

"Speaking of reinvention -- or rather self-invention -- few people are attracting as much attention for having mastered this in the social media age as Tim Ferriss, the "superbad" self-promoting self-help guru who makes licensed therapists, time-management experts and exotic ashram retreats seem obsolete."

superb