(just) between you and me (US also (just) between us) used to tell someone that what you are about to say should be kept secret 用来告诉某人你将要说的话要保密;作为你我之间的秘密，不要告诉别人 A: Do you think Mia is a good worker? 你认为米娅是个好员工吗? B: Between you