A Daddy in gay culture is a slang term meaning a man sexually involved in a relationship with a younger male.
[5] According to the Historical Dictionary of American Slang, the earliest use of "daddy" in a non-paternal context was in 1681, in reference to what sex workers called their procurers or older male customers.
[6][7] Throughout the 1920s, the term was used in blues music and African-American Vernacular English to mean one's boyfriend, especially an older man or a sugar daddy.
[11] In the 1970s, the "leather daddy" archetype (which has sadomasochistic associations) was proliferated in such media as the Drummer magazine (launched in 1975); 1976 to 1979 gay pornographic films Working Man Trilogy; and BDSM novels by Larry Townsend.
"[14] In 2018, Braidon Schaufert claimed that, by creating the 'daddy' term, "Queer communities have separated the specific gender performance of fatherhood from the actual act of raising children".