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Twig one's lay

Posted by Taupe usa on November 22, 2007

Twig one's lay. I've gathered this means "understand one's position / approach / scheme," and I found the pieces in wiktionary (twig: 'From Irish and Scots Gaelic tuig, "to understand"'; lay: "Arrangement or relationship; layout"), but it'd be nice to read some history on this. Is it a common phrase, or just an invention used in the kind of books I read?