side against

side against idiom
Refuse to support, oppose in a dispute, as in The older club members sided against the new program director and her strenuous exercise programs. [First half of 1700s] For the antonym, see side with.

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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