Childhood cartoon characters that have suffered through major trauma and have transformed into a twisted version of themselves. There is a very short list of real BEFs, while many that are added by fans are unworthy of the title.
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.