More than a sip is a phrase used to describe a larger amount of liquid than a single sip. The term can be used to describe three different amounts of liquid: a GULP (4 letters), a SWIG (4 letters), and a glassful (8 letters). A GULP is a large swallow of liquid, usually taken quickly. A SWIG is a large mouthful of liquid, usually taken in one go. A glassful is the amount of liquid that would fill an entire glass.