put in a good word

Make a supportive remark or favorable recommendation. For example, Please put in a good word for me with the supervisor, or When you see her, put in a good word for the department. The use of good word for a laudatory utterance dates from about 1200.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.