What is moose knuckle? It's when we can see a man's ballsack in the bulge of his tight pants! What better way to start our week than with a rundown of classic moose knuckles from celebrities. 

Matt Damon in The Talented Mr. Ripley

Sacha Baron Cohen in Borat

David Bowie in Labyrinth 

Justin Beiber in Calvin Klein's Underwear Ad

Idris Elba in Mandela: Long Walk to Freedom

Tom Cruise in Magnolia

Peter Hinwood in Rocky Horror Picture Show

Matt Bomer in American Horror Story

And even more Matt Bomer in Magic Mike