Rub in

What is Rub in ?

Rub in is (verb) 1. to make an ointment or cream enter the skin by rubbing She rubbed the ointment into her skin. 2. don’t rub it in don’t go on talking about something I regret (informal.) Yes, I know I made a mistake, but please, don’t rub it in.

 

source: Easier English, Student Dictionary Upper Intermediate Level