clear as mud

Murky, obscure, totally unclear, as in The translation of these directions is clear as mud. This ironic phrase always indicates that something is far from clear. [Early 1800s]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.


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Historical Examples of clear as mud