The expression means to meet an expected standard, but is often used in the negative, such as, “The performance did not cut the mustard.” There are several theories on the origin, but The Phrase Finder believes it came from “the heat and piquancy of mustard and the zest and energy of people’s behavior.” “Cutting” has long been used to mean “exhibiting” as in “cutting a fine figure.” Therefore, cutting the mustard is “…an alternative way of saying ‘exhibiting one’s high standards’.” The Iowa State Reporter used the expression ‘Cut the Mustard’ in 1897.