n. A person who believes everything they hear.
1994
Whether he jumped or was pushed, Vince Neil is gone and Motley Crue is all the better for it. From the opening notes of the anti-critic, anti-skeptic, anti-everything-but-us Power To The Music, it's clear that new recruit John Corabi is a more than able replacement.
1987 (earliest)
Which are the contrarians? Answer: both the many skeptics who insist the bull market is skating on thin ice, and all those anti-skeptics who argue that the bull market is on solid enough ground or that, even if it isn't, the worrywarts will have to throw in the towel, come back in on the buy side, and so help keep driving prices higher.