Posted by R. Berg on April 09, 2003
In Reply to: Too smart posted by peter dunn on April 08, 2003
: what is the origin of "too smart by a half"?
A common form is "too clever by half." Try this bit from the archives: https://www.phrases.org.uk/bulletin_board/8/messages/1395.html (link below). To find more comments, type "clever half" in the archive-search box.