gobemouche
noun
gobe·mouche
(ˌ)gōb¦müsh
plural gobemouches
-sh(ə̇z)
: a credulous person
especially : one who believes everything he or she hears
as words here cost nothing, the gulping gobemouche is plentifully supplied 
Richard Ford
Richard Ford 
Word History
Etymology
French, from gober to gulp down, swallow + mouche fly, from Latin musca