hit it off

CIDE DICTIONARY

hit it off, v. i. 

 To get along well together; to be compatible; to work well together; -- of people in interactive situations; as, the new chemist hit it off immediately with his supervisor.  [PJC]

THESAURUS

hit it off

accord, agree, agree with, associate with, be acquainted with, be friends, be inseparable, chime in with, correspond, cotton to, empathize, fall in with, fraternize with, get along, get along with, get on with, harmonize, harmonize with, hobnob with, identify with, interchange, know, reciprocate, respond to, sing in chorus, sympathize, understand one another