Selling out is a common idiomatic pejorative expression for the compromising of a person's integrity, morality, , or principles in exchange for personal gain, such as money. In terms of music or art, selling out is associated with attempts to tailor material to a mainstream or commercial audience; for example, a musician who alters his material to encompass a wider audience, and in turn generates greater revenue, may be labeled by fans who pre-date the change as a sellout.