Utter Butter

Adjective;

Used to describe some one who is a total imbecile, a buffoon, a nincompoop, a halfwit, a clod, who makes a mockery of their profession and general existence. They are completely hopeless, bereft of any kind of credibility and good common sense.

Gosh dang it Sarah is an utter butter
Writing an article about haikus and including a poem which is CLEARLY NOT a haiku was just an utter butter move
We really need to whip him into shape, because right now, he's just an utter butter
Gee she's acting like she's spread real thin, must be an utter butter