the.com/sugar daddy

means An older, wealthier man who showers a younger partner with money and gifts in exchange for companionship or romance.

from American slang from the early 1900s, built from 'sugar' — long used as a term of affection and, by extension, slang for money or treats — paired with 'daddy' in its older sense of an older man who takes care of someone. The term seems to have surfaced in the 1920s jazz-age era, when 'sugar' was already shorthand for cash and sweetness alike, making 'sugar daddy' a near-literal label for a man who hands out both.