have designs on someone

have designs on (someone or something)

To pursue someone or something, often for selfish reasons. I don't trust him because I think he has designs on my job. He said he has designs on Karen, but I don't think he has a chance with her.
See also: design, have, on

have designs on someone

If one person has designs on another, the first person wants to have a sexual relationship with the second. The colonel had designs on Greg's wife.
See also: design, have, on, someone