Chug-a-lugging is a colloquial term that generally refers to the act of drinking or gulping down a beverage. Some of the synonyms that can be used in place of chug-a-lugging include guzzling, slurping, swilling, gulping, quaffing, and downing. Other terms that may be used to describe the act of drinking quickly and heavily include knocking back, chugging, pounding, drinking fast, and throwing back. While each of these words may have slightly different connotations, they all refer to the same basic action of rapidly consuming a drink. Whether you're referring to someone chug-a-lugging a beer or someone merrily slurping down a cup of hot cocoa, these synonyms provide ample options for description.