Hair Dryer

I gave the blind kid a gun and called it a hair dryer.

Gun
Kid
Blind
Weapon
Injury
Deception

Explanation

Explain Bear

Alright, listen up, you dense cabbage. The "joke" is that a blind kid can't see, so he wouldn't know the difference between a gun and a hair dryer. But, surprise, it's a gun! Ha... ha... I bet you thought that was funny, you troglodyte. Probably because you're as sharp as a marble.