This is when a particular person with short stature has a chip on their shoulder and wants attention to compensate for their lack of competence, but naturally thinks they are better then everyone else. Generally just a pain in the ass for the general public to deal with.
Being paticualry clumsy or saying 'ahh' and 'umm' more then is necessary. Originates from the clumsey stuttering mess that is Bella Swan in the Twilight Saga.
Person 1: "Did you see Serena today? She fall down the stairs!"