Today’s idiom: break a leg
Meaning: good luck!
Origin: The phrase as we know it today refers to theatre, apparently originating in the States. The original meaning behind the phrase is up for speculations. One theory is that “break” refers to breaking the line of the legs to bow or curtsy, another is that “leg” refers to the curtain and this phrase is talking about receiving a curtain call, while another theory is that it refers to having one’s “big break” in show business. A popular – likely incorrect – theory is that this phrase refers to when John Wilkes Booth broke his leg jumping onto the stage after assassinating President Lincoln. The earliest printing of the phrase in reference to theatre is found in The Charleston Gazette in 1948.