When your forehead and/or chin are roundish are longer than your nose. Making the person's face look like it has been mashed in the middle like a potato.
Def 1: The act of cloning ones self creating a second completely identical human. This definition for the word was said to of originated in the small suburbs of Newcastle Australia.
Def 2: A nick-name given to someone as a last resort.
Def 1 E.g.
Dave: Dude, you ever thinking of having kids?
Karl: Idk, thinking about having a potato sex child.
Dave: Man! WTF?!?!?!
Def 2 E.g.
Kid 1: What nick-name are we gunna give that new kid?
Kid 2: Hmm, Im a bit messed up from that weed so I think we're gunna have to go with potato sex for now.
Just following sexual intercourse you must proceed to ejaculate on your partners back. Using your fingers to smear the cum out into a thin layer. Allow to dry overnight, and upon waking in the morning force your partner to eat it.