The crossword solution for the term CHEEK OR LIP is SASS. SASS stands for 'saucy or impudent talk', which is a type of behavior that involves speaking in a disrespectful or insolent manner. It is often used to describe someone who speaks back to authority figures or those in positions of power. In terms of body parts, SASS can refer to either the cheek or the lip, as both are used to express emotions such as anger, frustration, and defiance.