Downing the hatch is a phrase commonly used to describe the act of quickly consuming a drink or swallowing a pill. There are a number of synonyms that can be used in place of this phrase to achieve a similar meaning. Some of the most common include chugging, guzzling, slamming, swallowing, and knocking back. Each of these phrases implies a sense of urgency or rapid consumption. Other synonyms that could be used include ingesting, imbibing, scarfing down, and gulping. No matter which synonym is used, the meaning remains the same, conveying a sense of completing an action quickly and efficiently.