stack up

Idioms & Phrases

stack up

  1. Measure up, equal, as in Their gift doesn't stack up against mine. This usage alludes to piling up one's chips at poker, and comparing them to those of the other players. [Early 1900s]

  2. Make sense, seem plausible, as in Her explanation just doesn't stack up. Also see add up, def. 2.

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