sell out

Idioms & Phrases

sell out

  1. Dispose of entirely by selling. For example, The rancher finally sold out to the oil company, or The tickets to the concert were sold out a month ago. [Late 1700s]

  2. Betray one's cause or colleagues, as in He sold out to the other side. [Slang; late 1800s]

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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