Green’s Dictionary of Slang

bomb adj.1

also bomb-ass
[bomb n. (11)]

very good, excellent, the best.

[US]D. Goines Street Players 147: I had some bomb stuff, man.
[US]L. Stavsky et al. A2Z 9/2: bomb – great: There’s a lotta bomb talent in the house.
Online Sl. Dict. [Internet] bomb, the adj 1. very good, excellent, the best; COOL, AWESOME. [...] (‘That movie is bomb!’).
[US]Eble Campus Sl. Nov. 1: bomb-ass – very good.
(con. 1980s) [Internet] bomb adj. Something favorable.
[US]C. Eble UNC-CH Campus Sl. Spring 2016 2: BOMB - fantastic, wonderful: ‘The food my mom cooks is always bomb’; ‘I look bomb af today.

In compounds

’bomb-baida (n.) [ety. unknown]

(US black) extremely potent marijuana.

[US]Ebonics Primer at [Internet] bomb – Baida Definition: bomb ass weed Example: Who wanna hit dis big bad ass ‘Bomb-Baida’?
bomb-diggity (adj.) (also bomb-biggity, bombdigadee, bomb-diggidy) [var. on hot diggety (dog)! excl.]

(US black) a general term of approval.

[US]College Sl. Research Project (Cal. State Poly. Uni., Pomona) [Internet] Bomb-biggity (adj.) All that; very good.
[US]Hope College ‘Dict. of New Terms’ [Internet] bomb-diggidy n. The name or title given to someone or something for being extraordinary, extra special, or completely awesome.
[US]Eble Campus Sl. Spring 2: bombdigadee – really good.
[US]Ebonics Primer at [Internet] bomb diggity Definition: phat, hype, dope. Example: Shit, that ride is Bomb Diggity!