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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]

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.