Meaning

noun a chronic drinker

originFrom Middle English sot, from Old English sot, sott (“foolish, stupid”), from Medieval Latin sottus (“foolish”), of obscure origin and relation. Possibly an expressive interjection, similar to French zut! (“damn it!”). Compare Middle Low German sot (“insane, foolish, stupid”), Middle Dutch sot ("foolish, absurd, stupid"; > modern Dutch zot), French sot (“stupid, foolish, goofy”).

Etymology from Wiktionary, CC BY-SA 3.0