A fork of Rural Dictionary
Party piñatas are traditionally shaped as donkeys and are candy filled with a hard exterior. Someone who acts like an ass but is actually a sweet person can be described as a piñata.
You: "Ugh, Sean is such a jerk! I don't know how you're friends with him." Me: "Actually, he's a piñata. He puts on this front as a womanizer and a douche bag, but is the nicest person."