get with someone

get with (someone or something)

1. To be knowledgeable about and engaged with something. The boss is going to want us to know exact figures in the meeting, so you better get with it. You really need to get with the times, Dad. People just don't talk that way anymore!
2. slang To have a romantic or flirtatious interaction with someone. A: "Is it true that you got with Katie over the summer?" B: "Yeah, we've been on a few dates so far."
3. slang To have sex with someone. I wouldn't be surprised if he got with her last night after the party—they were very flirty all night.
4. To meet with someone or some group, especially in order to accomplish some specific task. I want you to get with our lawyers right away and see what needs to be done.
See also: get
Farlex Dictionary of Idioms.

get with someone

in. to find out about someone; to get to know someone. I’d really like to get with her, but she’s so distant.
See also: get, someone
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • get with
  • get with (someone or something)
  • get with it
  • write the book on
  • wrote the book on
  • wrote the book on (something)
  • know a thing or two
  • know a trick or two
  • know (one's) beans
  • keep on top of (someone or something)