gobemouche

n.

[F.]
Literally, a fly swallower; hence, once who keeps his mouth open; a boor; a silly and credulous person.

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[F., flycatcher] a credulous person; esp. one who believes everything he hears

IN BRIEF: n- One who believes everything he hears.

Tutor's tip: This word was used in the 2006 Scripps National Spelling Bee finals.