There are numerous synonyms for the phrase "big drink," including "super-sized drink," "large beverage," "jumbo refreshment," "giant slurp," and "mega gulp." Other options include "thirst buster," "huge quencher," "king-sized thirst quencher," and "mammoth thirst satisfier." If you're looking for something a little more casual, you might choose to describe a large drink as a "monster-sized beverage," a "gargantuan gulp," or a "whopper refreshment." Whether you're ordering a drink at a fast food restaurant or grabbing something from the convenience store, there are plenty of ways to describe a thirst-quenching beverage that will satisfy even the biggest thirst.