sweet on, be

be sweet on

To be smitten with or enamored of someone. I think Samantha is a little sweet on her older sister's boyfriend. What about you, Tommy—anyone in school you're sweet on?
See also: on, sweet

sweet on, be

Enamored of, in love with, as in I think Barbara's sweet on Nick. This colloquial idiom was first recorded in 1740.
See also: sweet