Green’s Dictionary of Slang

good n.

1. (orig. US) alcohol; thus get good, to get drunk.

[US] in G.W. Harris High Times 28: Each party should [...] treat: a quart of the good.
[US]Ade Pink Marsh (1963) 173: I got good on gin an’ honey.

2. (drugs) phencyclidine.

[US]ONDCP Street Terms 10: Good — PCP .

3. heroin.

[US]ONDCP Street Terms 10: Good — [...] heroin.

4. marijuana.

OutKast ‘Two Dope Boyz’ [lyrics] I smoke good, cuz see it go good wit them flows.
[US]UGK ‘Life Is 2009’ [lyrics] Chill at the Ponderosa and smoke that good.
DJ Khaled ‘Outro’ [lyrics] Smokin good, counting paper, tryin to dodge the Babylon.

SE in slang uses

In phrases

do a bit of good for oneself (v.)

(Aus.) of a man, to seduce, to gain a woman’s sexual favours.

[Aus]D. Stivens Jimmy Brockett 20: Tell us about the time you did a bit of good for yourself with that English actress.
[Aus]C. Bowles G’DAY 7: Shane and his friend Macka are going to the disco. [...] They are hoping to crack on to some tarts and do a bit of good for themselves.
do oneself a bit of good (v.)

1. to make money (e.g. by a successful wager).

[UK]Sporting Times 22 Feb. 3/1: One of the waiters [...] took great pains to shew him the greatest attention in the hope of being told ‘something’ to, as he himself expressed it, ‘do himself a bit of good’.

2. to improve one’s situation.

[UK]F. Norman Fings I i: No well, I fort I might come over and do meself a bit of good.