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Phrase(s): all wool and a yard wide
Fig. trustworthy and genuinely good. (A description of good quality wool cloth.) • Mary’s a fine human being—all wool and a yard wide. • I won’t hear a word against Bill. He’s all wool and a yard wide.
McGrawhill's American Idioms And Phrasal Verbs
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general::
Genuine, not fake; of excellent quality; also, honorable. For example, You can count on Ned? be's all wool and a yard wide. This metaphorical term alludes to a length of highly valued pure-wool cloth that measures exactly a yard (and not an inch less). [Late 1800s]
American Heritage Idioms