diamond cut diamond(redirected from diamond-cut-diamond)
diamond cut diamond
A situation in which two equally sly or devious people spar or interact. Primarily heard in UK. It's always diamond cut diamond when those two schemers get together.
diamond cut diamonda situation in which a sharp-witted or cunning person meets their match. British
1863 Charles Reade Hard Cash He felt…sure his employer would outwit him if he could; and resolved it should be diamond cut diamond.