Who said "Unicorns. You know how to whistle, don't you?"?

This quote is attributed to Deadpool.

Unicorns. You know how to whistle, don't you? - Deadpool

"Unicorns. You know how to whistle, don't you?"

Deadpool Humor

"I'm just a girl in love with a boy asking him to love her back."

"Maximum effort!"

"You're so brave, and stupid. Mostly stupid."

"I'm gonna do to you what Limp Bizkit did to music in the late 90s."

"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."