in someone's debt

in someone's debt

1. Very grateful for something (a favor) that someone has done for one.
   • 1972 March 14, Mario Puzo, Francis Ford Coppola, The Godfather, spoken by Vito Corleone (Marlon Brando), Paramount Pictures:

     You never wanted my friendship and you were afraid to be in my debt.

• “in someone's debt”, in OneLook Dictionary Search.