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The American Heritage Dictionary of Idioms » not all it's cracked up to be
not all it's cracked up to be
not all it's cracked up to be idiom
It is disappointing, it does not live up to its reputation, as in The restaurant wasn't all it's cracked up to be. This term uses crack up in the sense of “to praise,” which survives only in this expression. [Colloquial; early 1800s]
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