One who plays a song via any mp3 device, waits roughly 30-60 seconds into the song and changes it to another. A shuffle bunny can be found in most automobiles that are either mp3 compatible or have an mp3-radio adapter.
Shuffle bunnies are most notorious for wanting to expose you to their entire musical taste in one car ride.
Frank: "Hey dude, listen to this song! *waits 30 seconds* Oh, no wait! Listen to this one! *Switches song and waits another 30 seconds* Oh, this one is sick though! Do you know this band? *Switches song etc...*
James: OH! You're such a shuffle bunny!