Who said "Thank you, come again!"?

This quote is attributed to Barney Gumble.

Thank you, come again! - Barney Gumble

"Thank you, come again!"

Barney Gumble Gratitude

"Woo-hoo!"

"To alcohol! The cause of, and solution to, all of life's problems."

"I'm gonna go back to the lab and study some... stuff."

"Barney's my name, drinking's my game."

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"