Numbnuts

[Justin Bieber]

A person of severely limited intellectual prowess.

[Donald Trump]

Numbnuts (nuhm-nuhts)
Noun

1. The stupidest of the stupid. A complete dumbass, one whose intelligence quotient does not surpass that of the average rock.

2. An utter disgrace of humanity.

3. One whose purpose in life is meaningless; a complete and total waste of life.

4. An ignorant, arrogant asshole.

See [jerkoff], [fuckhead], [asswipe], [shitfucker].