gulper

"The gulper at the party drank down his beverage in one swift motion."

"She was known as a gulper, always finishing her meals faster than anyone else."

"The baby was a gulper, eagerly consuming every bite of his food."

"He gulped down his drink after the long race."

"She always gulps her food when she’s in a hurry."

"The dog gulps its food as soon as it's put in the bowl."