Someone who bumbles; a stumbler or blunderer.(noun)
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Use "bumbler" in a sentence
"Unlike the good-natured bumbler from the Disney cartoon, this honey-happy bear is a manipulative, abrasive, self-indulgent schemer who is clearly unapologetic in his larcenous adventure."
"As to Morgan: the sooner the old bumbler is put out his own (and Wales's) misery, the better."
""Gerald Ford became known as a bumbler," he recalled, "and every time he hit his head on a door it became news.""