Highly unattractive human being. We're talking 5 star ugly here. Rides the bus a.k.a. The Gargamel Express. Natural habitat = Walmart.
Sena: Some greasy haired, pajama pants wearing freak on the bus asked me out on a date to Walmart! Can you believe that? Joey: Gargamel... er what?
An expression used to describe awe, shock or disbelief.
Joey told Sena the sky was falling. "Ishkabibble!", said she.