There are multiple synonyms for the phrase "reason to drink". Some of them include "occasion to indulge", "justification to imbibe", "excuse to sip", "motivation to quaff", and "purpose to toast". These phrases indicate an event or circumstance that provides an opportunity or incentive for drinking. It is important to note that excessive drinking can have negative consequences, so it is crucial to drink responsibly and in moderation. Ultimately, whether you are celebrating a special occasion or simply unwinding after a long day, it is important to ensure that you are making informed decisions when it comes to drinking.