"Hits sauce" is slang that refers to a person who enjoys drinking alcohol, usually to excess. There are a plethora of synonyms that can be used to describe someone who "hits sauce." Examples might include: a booze hound, a lush, a drunkard, a tippler, a sot, a wino, a guzzler, a dipsomaniac, a bibber, a toper, or a drunk. Each of these phrases carries a different connotation, and may be used in different contexts. It's worth noting that while "hits sauce" may be used casually among friends to describe someone who has had a few too many drinks, referring to someone as a drunkard or a dipsomaniac can be seen as derogatory and pejorative.