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cast one's lot with

cast one's lot with idiom

Also, cast or throw in one's lot with. Join or side with, no matter what the outcome, as in Bill cast his lot with the new company. [First half of 1500s]

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.