Who said "This is heavy, like your conscience."?

This quote is attributed to Biff Tannen.

This is heavy, like your conscience. - Biff Tannen

"This is heavy, like your conscience."

Biff Tannen Humor

"I'm your density. I mean, your destiny."

"Make like a tree and get outta here!"

"Nobody calls me chicken!"

"You're my favorite girl, McFly."

"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."