Verb
hit it off (third-person singular simple present hits it off, present participle hitting it off, simple past and past participle hit it off)
(informal) To develop an amicable relationship (with), especially in a sudden manner during an initial encounter.
I really hit it off with Jack, and hired him without needing an interview.
Those two are really hitting it off. I wouldn't be surprised if they started dating soon.
I had a feeling it was gonna work out because not only did I enjoy the music and hit it off with the guys, but I was into theatrical rock and was willing to wear makeup and do anything to make it. Ace Frehley
During my most recently controlled near-death experience, I got to interview William Shakespeare. We did not hit it off. He said the dialect I spoke was the ugliest English he had ever heard, "fit to split the ears of groundlings.”. Kurt Vonnegut
Madam your wife and I didn't hit it off the only time I ever saw her. I won't say she was silly, but I think one of us was silly, and it wasn't me. Elizabeth Gaskell
I think Taj and Nina were better friends, because they get along, they have a lot of fun and they laugh. But it seems that Nina and Jack really hit it off. Nina really fell in love with Jack. there's a lot of chemistry between them! Delta Goodrem
I'd done a big movie that I wasn't happy with, and I was moving out of London when I got approached about Barton Fink, because my agent said the brothers were in London. We hit it off immediately, and suddenly I found myself on the way to America! Roger Deakins
“At first I was a little reluctant, but then we hit it off, and we came to an understanding. Source: Internet