Meaning

noun a man who has sex with and is supported by a woman

originFirst attested in English in 1922. From French gigolo (“young lover kept by an older woman”), first attested in that sense in 1904 (attested since 1850 in the sense “Amant de cœur, compagnon d'une gigolette", and since 1894 in the sense “elegant young man whose means of livelihood are dubious”), a back-formation from gigolette (“promiscuous dancing girl, girl available for hire as a dancing…

Etymology from Wiktionary, CC BY-SA 3.0