Dingbat

[Becky]

A ridiculous, silly or stupid person.
The word dingbat originally refers to to a character or symbol used in [typesetting] which gives an instruction to the printer. These should be removed before the text is published, but were occasionally left in by mistake. The character made no sense to non-typesetters and the association of [dingbat] with nonsense and [forgetfulness] carried over to describe people.

[Sommer]

A stupid or eccentric person.

[Cami]

In [Kentucky], a slang term for somebody so [daft] that they LITERALLY [dont know] which way is up.

[Justin Bieber]

A term used to describe a very stupid or unintelligent action or person. Has nothing to do with [bats] or [ding].

Synonyms are: dumb, stupid, [brainless] etc.

[Kit]

A weird thing, person or situation, a person considered stupid or [foolish].
A set of fonts [showing] pictures instad of [letters].