The term 'Drink in One Gulp' can be summarized by the crossword solution CHUG, which is a four-letter word. Chugging is a slang term for drinking a beverage quickly, usually in one gulp. It is often used to describe the act of drinking an alcoholic beverage quickly, but it can also refer to any type of drink. Chugging is popular among college students and other young adults, and is often seen as a way to show off or prove one's drinking prowess.