Green’s Dictionary of Slang

daddy n.

1. [late 17C+] a general term of address.

2. [mid-19C] (UK Und.) an accomplice who is pre-ordained to win the prize in a fake raffle or lottery.

3. [mid-19C] the old man, generally an aged pauper, in charge at a tramp’s lodging house or casual ward.

4. [mid-19C] the man who gives away the bride at a wedding, trad., but not invariably, her father.

5. [mid-19C+] an influential, powerful person, e.g. a civic leader.

6. [mid-19C+] as the daddy, the supreme example, the most important, powerful, the best, the best known etc, often as the daddy of them/us all.

7. [1910s+] a boyfriend, a lover; also as a term of address.

8. [1920s+] (orig. US) an older man who is willing to provide the various material desires of his younger mistress or, if gay, male lover.

9. [1920s+] (US black) a form of address to a black male, esp. by a woman to her lover.

10. [1930s] (US tramp) a Cadillac [as a rhyme on Caddy n.].

11. [1930s+] (US) a pimp, a prostitute’s boyfriend.

12. [1940s+] a masculine lesbian.

13. [1940s+] (UK prison) a leader (through intimidation and other influence) of the inmates in a borstal or prison.

14. [1950s+] an older male homosexual; a masculine homosexual.

15. [1960s–70s] (US prison) the ‘active’ or ‘masculine’ partner of a homosexual couple.

16. [1970s] (US) a customer, a client.

17. [1990s+] an unspecified object, a thing.

In compounds

daddy-one (n.)

[20C+] (US black) a lover or any man who provides for a woman.

In phrases

like daddy-come-to-church

[1950s] (US) to a very great extent, very much, a great deal.

sweet daddy (n.)

1. [1910s] (US prison) a predatory prison homosexual.

2. [1950s+] (US black) a lover or any man who provides for a woman; a pimp.

swing daddy (n.) [swing v. (8) + sense 7 above] [1970s+] (US black)

1. an attractive, well-dressed man.

2. a male lover.

3. a pimp.

who’s your daddy? [? sense 11 or 14 above, i.e. a mocking statement of the speaker’s domination/humiliation of their target]

[2000s] (US black) a deliberately insulting form of address.

SE in slang uses

In compounds

daddy-bag (n.) [their function in procreation]

[1990s+] (US black) the testes and the scrotum.