sapere il fatto proprio

Italian

Etymology

Literally, “to know one's own fact.”

Verb

sapere il fatto proprio

1. to have knowledge and competence in a particular area; to know one's job; to be capable in going about one's business; to know what is what; to know one's stuff

   Sa il fatto suo ma non lavora bene in squadra.

   He knows his stuff, but he does not work well in a team.