When a person shoves their left fist up another persons ass and movies their right arm as if playing a song on a fiddle.
by peter griffin, jr. June 6, 2009
Get the fiddle fistmug. It's hide and seek but instead when you hide you pull your pants down and bend over the person looking for you will walk around looking for you with a lubed up fist and if he finds you he fists you as hard as he can.
by The MTS lads November 15, 2017
Get the Fiddle-Fistsmug.