Green’s Dictionary of Slang

lover n.

1. (US) a pimp [euph.].

[US]Number 1500 Life In Sing Sing 250: Lover. A man who receives support from a prostitute.
[US]Mencken Amer. Lang. (4th edn) n.p.: A pimp is a . . . McGimp, fish and shrimp, lover, Latin lover and many others.
[US]Monteleone Criminal Sl. (rev. edn).

2. (orig. US) an affectionate general term of address, though no actual love affair need be implied.

[UK]G. Stratton-Porter Harvester 194: ‘Hello, lover!’ cried Doctor Carey as the Harvester entered the office. ‘Are you married yet?’ .
[US]B. Schulberg Harder They Fall (1971) 91: Hello, lover.
[US]J. Thompson Alcoholics (1993) 31: Murph, lover, you are going to help me, aren’t you?
[US]A.E. Morgan Six-Eleven (1966) 184: Want some, lover?
[US]M.S. Brookins ‘Aspiration’, in Kochman Rappin’ and Stylin’ Out (1972) 382: Hi young lover, what’s happening?

3. (US Und.) a rapist or bigamist [euph.].

[US]Goldin et al. DAUL 130/1: Lover. 1. (P) (Ironic) A rapist; a bigamist; a seductionist; any criminal offender against the person of a woman.

SE in slang uses

In compounds

lover’s nuts (n.) (also love nuts, lover’s balls) [nuts n.2 (1)/balls n. (1)]

(US) aches in the testicles caused by sexual stimulation without ejaculation.

[US](con. early 1950s) J. Peacock Valhalla 36: ‘I got lover’s nuts.’ ‘VD or no, this ol’ kid’s gonna have some.’.
[US]B. Rodgers Queens’ Vernacular 34: Aching in the testes triggered by an inability to copulate [...] love nuts.
[US](con. 1952) G. Wolff Duke of Deception (1990) 177: I told her she had given me ‘blue balls, lover’s nuts.’.
[US]S. Morgan Homeboy 225: Joe’s deltoids bunched tighter than lover’s nuts.
[Aus]Tupper & Wortley Aus. Prison Sl. Gloss. [Internet] Lover’s balls. Excruciating pain in testicles when sexually aroused without the opportunity for sexual release. A problem for younger prisoners who maintain a heterosexual commitment.
[UK]K. Lette Foetal Attraction (1994) 19: When blue balls, or lovers’ nuts, as Maddy referred to them, forced them to resurface.
[UK]J. King White Trash 37: He was going on about his lover’s balls for all the next week.

In phrases