a joyful exclamation local to Baltimore, MD. Simply the coining of two similarly silly phrases, "beef Wellington" and "gee willickers!", through comedic pararhyme.
When someone comes up with a much better solution, but you're too dumb or stupid to realize it. You try to find flaws, but even Art says you're wrong so you walk away with a stupid look on your face.
A willicker is a cannibalistic mountain person grossly disfigured through generations of in-breeding or radiation poisoning. From movies like Wrong Turn and Hills Have Eyes.