The term 'CALLS IT QUITS' is a phrase used to describe someone who has decided to end something, usually a job or a relationship. The crossword solutions for this term are DESISTS (7 letters), RETIRES (7 letters), ENDS (4 letters), STOPS (5 letters), and THROWS IN THE TOWEL (14 letters). DESISTS means to stop doing something, RETIRES means to leave a job permanently, ENDS means to bring something to an end, STOPS means to cease an action, and THROWS IN THE TOWEL means to give up on something. All of these words and phrases can be used to describe someone who has decided to call it quits.