Entry 1 sense Webster, 1913 Boozer /bo͞oz'-ẽr/ · Booz·er · IPA /ˈbuː.zə(ɹ)/ 01 n. One who boozes; a toper; a guzzler of alcoholic liquors; a bouser. 1. One who boozes; a toper; a guzzler of alcoholic liquors; a bouser.