Not off the top of my head, but here are a few examples for you: Don't know somebody from Adam Would you Adam and Eve it? ) Mitochondrial Eve Hurculean task Darwinian Neo-Darwinian Newtonian Marxism Platonic relationship If the mountain won't go to Mohamed, Mohamed will go to the mountain Old uncle Tom Cobley and all Uncle Tom Aunt Sally Send somebody to Coventry Disgusted of Tunbridge Wells Take coals to Newcastle Cheddar chease Parma ham Jesus H Christ! Judas Jezzobel Jessy A few different categories seem to emerge there.
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