break a leg

The phrase "break a leg" is a common idiom used in the performing arts industry, particularly in theater. It is used as a way to wish someone good luck before a performance or a show. The phrase originated as a superstitious way to counteract the bad luck associated with wishing someone good luck directly. It is believed that saying "break a leg" actually brings luck and a successful performance to the person it is directed to. Despite its literal meaning being negative, it is not interpreted in that way within this context.