Prone to dropping things; clumsy.

Someone who tends to drop things; (more generally) someone who is clumsy or uncoordinated; a klutz. / One's fingers which tend to drop things, or are clumsy or uncoordinated.

(less common, also attributively) Synonym of butterfingers (“someone who tends to drop things; (more generally) someone who is clumsy or uncoordinated”)