Something that has an abnormal form or shape is misshapen. For example, you might find an old misshapen Barbie, with messy hair and missing limbs, at the bottom of a toy chest.
Things that are so malformed or distorted that they look weird or ugly are misshapen. Ballet dancers sometimes end up with misshapen feet after years of cramming them into pointe shoes, and when you grow your own vegetables in your back yard, you often end up with misshapen ones that taste delicious. Misshapen comes from the Old English roots mis, "wrong," and scapan, "to create or form."