1
general::
Phrase(s): *clear as mud
1. Cliché not clear at all. (*Also: as ~.) • Your swimming pool needs cleaning; the water is clear as mud. 2. Cliché not easy to understand. (*Also: as ~.) • This physics chapter is clear as mud to me. • I did all the reading, but it’s still as clear as mud.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
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]
American Heritage Idioms