1) an expression of self-disgust in one's actions.
Circa 1984. "Moof, Moof!" was exclaimed by a friend after exhausting all efforts to find a word to discribe his embarassment after his inability to complete a rather simple task.
moof(y) (noun/adjective) is a word used to describe someone who thinks they are unlike other girls because of their music taste, mental state or their style. It could also be used to describe something that is strange or unusual.
A nightmarish creature, fictionally created by a parent, that only comes out at night, resembling a very hairy oversized labia with heavy curtains that whip in the wind, and big beady bloodshot eyes, and exaggerated amount of teeth with a tongue that is froglike. And it's made out to be soooo scary that no one wants to meet the moof woof.