Definitions of cheek:

• noun:   either side of the face below the eyes
• noun:   either of the two large fleshy masses of muscular tissue that form the human rump
• noun:   an impudent statement
• noun:   impudent aggressiveness
• verb:   speak impudently to
• name:  A surname (common: 1 in 16666 families; popularity rank in the U.S.: #2104)