Grimace

Grimace may refer to:
 * A type of facial expression usually of disgust, disapproval, or pain
 * Grimace (composer), a French composer active in the mid-to-late 14th century
 * Grimace (character), a McDonaldland marketing character developed to promote the restaurant's milkshakes
 * Grimace scale, a method of assessing the occurrence or severity of pain
 * Grimace Shake, a McDonald's milkshake