Gullible
Gobemouche: A Person Who Believes All News, However Crazy It Sounds
An 1800s word, but God do we have those types still!

The word gobemouche comes to us directly from French, in which it’s a combination of gober (to swallow) and mouche (a fly). For this reason, the common bird known in English as a flycatcher is known in French-speaking areas as the gobemouche. And I suppose…