Who said "Friendship is just a word—loyalty is what matters."?

This quote is attributed to Biff Tannen.

Friendship is just a word—loyalty is what matters. - Biff Tannen

"Friendship is just a word—loyalty is what matters."

Biff Tannen Friendship

"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."

"Friendship is built on trust and honesty."

"True friendship is worth more than gold."

"Good friends are like stars, always there even when you can't see them."

"Friendship means sacrifice."