Green’s Dictionary of Slang

lucy n.

1. (S.Afr./US gay) one who has a ‘loose asshole’.

[US]B. Rodgers Queens’ Vernacular.
[SA]K. Cage Gayle 80/2: Lucy n. a promiscuous person who likes being the passive partner in anal sex.

2. in drug uses [they all help one become SE loose; i.e. less tense, less stressed].

(a) marijuana.

[US](con. early 1950s) J. Ellroy L.A. Confidential 151: He was hooked on sweet Lucy.

(b) heroin.

[US]J. Ellroy Brown’s Requiem 70: ‘I want to go out walking with my Lucy.’ He made a gesture with his hand, indicating shooting up.

(c) see loosies n.

In phrases