sell someone on

sell someone on idiom
Convince or persuade someone of the worth or desirability of something, as in They were hoping to sell enough legislators on their bill so that it would pass easily, or Dave was really sold on that new car. [Colloquial; early 1900s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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