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gang up

gang up idiom
  1. Also, gang up with. Act together as a group. For example, The residents ganged up to make the neighborhood safer. [Colloquial; c. 1920]
  2. gang up on or against. Join in opposition or attack against, as in The big kids were always ganging up on the little ones, or They all ganged up against the substitute teacher. [1920s]

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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