The phrasal verb "hit it off" is primarily used in informal contexts. It is often employed to describe two or more people who form an immediate rapport or friendship upon meeting for the first time. The expression implies a natural, easy-going, mutual affinity, and it is frequently used in both social and workplace settings where personal chemistry is relevant. For instance, it might be said of two colleagues who quickly establish an effective working relationship or two strangers who become fast friends. This phrasal verb is less common in formal contexts or writing, where terminology like "establish a strong connection" or "form an instant rapport" might be preferred. Being a colloquial expression, "hit it off" is versatile in conversational English, emphasizing positive social interactions and shared comfort or enjoyment in each other's company.
B1
Intermediate
1. To quickly form a good relationship with someone.
She and her new colleague really hit it off, having a multitude of interests in common from day one.
When Tom introduced Mary to his friends, he was surprised at how well she hit it off with everyone.
Though they had never met before, they instantly hit it off, sharing stories and ideas as if they were old friends.