honor (someone's) check
To give one money in exchange for a check from someone; to cash a check from someone. The bank said they couldn't honor your check because you didn't have enough funds in your account.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
honor someone's check
to accept someone's personal check in payment of an obligation. The clerk at the store wouldn't honor my check. I had to pay cash. The bank didn't honor your check when I tried to deposit it. Please give me cash.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.