hit on

US /hɪt ɑːn/
UK /hɪt ɑːn/
"hit on" picture
1.

to make sexual advances toward someone

:
He tried to hit on her at the bar.
She didn't like it when he started to hit on her.
2.

to suddenly discover or think of something

:
I think I've hit on a solution to the problem.
They finally hit on a way to make the process more efficient.