In a bacchanalian manner; with wild drunken revelry and excessive indulgence.
From bacchanalian with the adverbial suffix -ly added. Transforms the adjective into an adverb describing how an action is performed.
This adverb is so long and rare that almost nobody uses it—but when someone does, it's hilariously overkill, like describing a wild night using a ten-syllable word instead of just 'crazily'!
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