Who said "Mockery is an art form and I'm a master."?

This quote is attributed to Nelson Muntz.

Mockery is an art form and I'm a master. - Nelson Muntz

"Mockery is an art form and I'm a master."

Nelson Muntz Art

"Ha-ha!"

"Your tears of unfathomable sadness!"

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

"Eat my shorts, Simpson!"

"The stage is my true home."

"Art is the expression of the soul."

"Living well means living properly."

"Art and music are the treasures of civilization"