Jeff Bridges (playing Jeff Lebowski) says No shacking his head. This gif of disapproval comes from the movie The Big Lebowski.  Where Jeff Lebowski,  know as “The Dude”, an unemployed dude from LA and a sick bowler has some adventures with a millionaire and his wife. The other guy sitting next to him is John Goodman

You can use this gif to reply with disapproval or deception. Also, when someone lets your down.