To make something alcoholic or to add alcohol to something; to turn something into or treat it like alcohol. It's a playful or informal verb.
From 'booze' (Middle Dutch 'buysen') + the suffix '-ify' (from Latin '-ficare', meaning 'to make'). The verb emerged in modern informal English as speakers playfully combined 'booze' with the common '-ify' suffix.
The suffix '-ify' is wildly productive in English—you can add it to almost anything to mean 'make it into that thing' (beautify, simplify, horrify). 'Boozify' is a modern joke word showing how English speakers instinctively create new verbs!
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