- come on to someone
1. in. to make advances to a person.□ He came on to her, but she beat it outa there fast.□ She didn’t even know he was coming on to her, till they got to his place.2. in. to try to get someone to respond romantically or sexually.□ She was just starting to come on to me when her parents came home.3. in. to begin to become friendly.□ After a few minutes, they began to come on to each other.□ When the nervousness of meeting a blind date passed, Sam and Mary began to come on, and we could see it would be a success.
Dictionary of American slang and colloquial expressions. 2015.