dry out - Phrases/Idioms
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.
Undergo a cure for alcoholism, as in After years of constant drinking, he realized that he needed to dry out. [1960s]