1) “Bark Eater” is an English translation of the Mohican word “Adirondack,” a term the Mohawk once used for Algonquian-speaking tribes who were said to eat the inside of the bark of the white pine when food was scarce.
2) “BarkEater” is an honor camper program at Massawepie Scout Camps in the Adirondacks. One who has been initiated into the program is also called a “BarkEater.”
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.