sweet on . sweet on {adj. phr.}, {informal} In love with; very fond of. John is sweet on Alice. Categories: add yours love {adj. phr.} {informal} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: S Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Leave my opinion