Doofus

[Tina]

Someone who hasnt got a clue!
They live in blissful ignorance of the world, fashion, personal hygiene and social skills.

Invariably laughs like a baboon being repeatedly punched.

[Britney]

An foolish, incompetent or stupid person.

[Little_Girl]

A total fucking idiot

[Donald Trump]

A big, slow, dumbass

see also [Homer Simpson]

[Couch Potatoe]

someone totally stupid, dumb and clueless (zong)

[Jessica]

One who behaves in an irrational or immature manner

[Couch Potatoe]

Democrats Obeying Obama For Universal Socialism (DOOFUS)

[Donald Trump]

a clueless person, most always lacking even the most basic social skills. a doofus often thinks they are a bit smarter then everyone else.

[PussyCat]

goofy, used in a teasing manner.