When someone says they're "hitting the sauce," it means they're drinking alcohol. However, there are many other phrases that can be used as synonyms to describe alcohol consumption. Some common ones include "getting plastered," "having a few drinks," "partying hard," "boozing it up," and "getting sloshed." Other options include "imbibing," "taking a nip," "sipping on some spirits," "pouring a stiff one," and "getting tipsy." While these phrases may be used interchangeably, they may carry different connotations or levels of seriousness. It's important to understand the context and tone of the conversation before using any of these phrases.