When sitting down on a stool naked, you start rocking back and forth and as you rock back and forth, your ass cheeks start spreading open revealing your asshole as you thrust backward and as you thrust forward, your ass cheeks close and thus your asshole isnt revealed anymore.
by Bobby Knobi February 1, 2010
Get the Poke it outmug. To poop.
by xpantsssonfire April 30, 2015
Get the poke one outmug.