Home › Words › S › smoothifiersmoothifiersmoothifier means A floating widget inside a beer can, which (unlike earlier fixed versions) prevents the contents from overflowing if opened when warm.Among words judged in Lexicurio's Arena, smoothifier ranks #28,418 of 42,762 for Qualifying.EtymologyFrom smooth + -ify + -er, a marketing coinage by Guinness.nounA floating widget inside a beer can, which (unlike earlier fixed versions) prevents the contents from overflowing if opened when warm.Definitions & examples from Wiktionary (CC BY-SA 3.0).