In a manner of daubing; in a way that is sloppy, crude, or done with thick careless strokes or applications.
From 'daubing' plus adverbial suffix '-ly', forming an adverb from the gerund. Traces back to Old French 'dauber' meaning to coat or smear.
This is a word that exists but almost nobody uses it—it's the kind of rare adverb that would make your English teacher smile if you slipped it into an essay about finger-painting!
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