hit it off (with somebody)
if two people hit it off, they like each other as soon as they meet

[TahlilGaran] Dictionary of Contemporary English ▲

hit it off
hit it off (with (someone))
to be friendly with each other immediately.
She hit it off with Dean and soon the two of them set out on a cross-country adventure.

We hit it off beautifully – we liked all the same things, and we liked each other a lot.

[TahlilGaran] English Idioms Dictionary ▲

hit it off
get along well with someone (usually from the beginning)
I hit it off with a woman in my photography class and we have been dating for several months now.

We really hit it off at the party.

[TahlilGaran] English Idioms Dictionary ▲

hit it off
v. phr., informal To enjoy one another's company; be happy and comfortable in each other's presence.
Tom and Fred hit it off well with each other.
Mary and Jane hit it off from the first.
Synonym: GET ALONG.

[TahlilGaran] English Idioms Dictionary ▲