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Something that is absoloutely disgustig, that makes you barf. A barfaton is basically a funny way of saying something is disgusting, and nauesating.

Pronounded 'Barf-A-Tron'
Friend 1: Ewww, I can NOT eat this soup, it has lumpy bits floating it it.

Friend 2: Eww, barfatron.

OR

Kid: Ewww, that Mole growing on her face is a complete Barfatron.
Kid 2: Yeah. Urgh.
by I Don't Like Moles. January 12, 2011
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