The photographer has acknowledged a/his 'debt' to Andy Warhol. [=the photographer has said that his work was influenced by the photographs made by Andy Warhol]
banks with millions of dollars of 'bad debt' [=banks that have loaned millions of dollars that will not be repaid]
She's finally paid off her mortgage 'debt'. [=the money that she owed the bank to pay for her house]
(..) -Out? -Of prison. Remember? I went for cigarettes and didn't come back. I don't smoke. Don't sit. -Supposedly I paid my debt to society. -Funny, I never got a check. You're not wearing your ring . I sold it. I don't have a husband or didn't you get the papers? -My last day inside. (..)2001 Ocean's Eleven