dip ‧ so ‧ ma ‧ ni ‧ ac /ˌdɪpsəˈmeɪniæk/ BrE AmE noun [countable] British English old-fashioned
[ Date: 1800-1900 ; Language: Greek ; Origin: dipsa 'feeling of wanting a drink' + English maniac ]
someone who has a very strong desire for alcohol, which they cannot control SYN alcoholic