Who said "Being mean is easy and feels great!"?

This quote is attributed to Nelson Muntz.

Being mean is easy and feels great! - Nelson Muntz

"Being mean is easy and feels great!"

Nelson Muntz Humor

"Ha-ha!"

"Your tears of unfathomable sadness!"

"I'm gonna enjoy this, Bart. I'm gonna enjoy this a lot."

"Eat my shorts, Simpson!"

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."