Pucker/ˈpʌkər/ Definition 1 of 2Pro Tip 1/3Facial Expressions Often used to describe facial expressions, especially lips when showing disapproval or preparing to kiss. He puckered his brow in concentration. Pro Tip 2/3Not Always Literal Can be used metaphorically to indicate something is not smooth or straightforward. The negotiation process puckered with unexpected demands. Pro Tip 3/3Pucker Up The phrase 'pucker up' is a common informal instruction to prepare for a kiss. Pucker up, I'm going to give you a smooch!