A habitual drunkard is someone who has a long-term pattern of excessive alcohol consumption. This term can be broken down into two crossword solutions: SOT (3 letters) and ROUNDER (7 letters). SOT stands for 'SOT', which is an old-fashioned term for a drunkard, while ROUNDER is a slang term for someone who frequents bars and pubs and drinks heavily. Together, these two terms describe someone who is a habitual drunkard.