The term 'Big Drink of Water' can be summarized by two crossword solutions: 'GULP' and 'SWIG'. A GULP is a large swallow of liquid, usually taken quickly. It is often used to describe the act of drinking a large amount of liquid in one go. A SWIG is a large draught of liquid, usually taken in one go. It is often used to describe the act of drinking a large amount of liquid in one go. Both words are used to describe the act of drinking a large amount of liquid in one go, which is what the term 'Big Drink of Water' implies.