A highly athletic sexual activity that involves three people and two unicycles. One unicyclist pedals backward with his arms extended while completely naked. Then the other unicyclist pedals forwards while bent over giving the other unicyclist a fellatio in the process which makes the two unicyclists look like a human bicycle. Finally the third person rides atop the human bicycle grabbing the arms of the first unicyclist to use as handlebars.
Guy A: Hey I gotta go a few friends and I are going on a dick-slurping run
Guy B: Hey can I come along too?
Guy A: No it's a one seater