turn onto someone/something

turn onto (someone or something)

To become especially interested in or enamored of someone or something. I really turned onto postmodern literature when I was in college. Sarah has turned onto real bad boys lately, dudes with motorcycles and gnarly tattoos.
See also: turn
Farlex Dictionary of Idioms.

turn onto someone/something

in. to become interested in someone or something. I tried to get her to turn onto me, but she could only think of John.
See also: someone, something, turn
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • turn onto
  • turn onto (someone or something)
  • (it's) just as well (that) (something happened)
  • it's as well
  • someone's back is turned
  • (one's) back is turned
  • a hold on (someone)
  • turn against
  • turn against (someone or something)
  • turn the tables on (one)