We played completely anonymous Dirty Santa in a college class once (For those who don't know, Dirty Santa someone chooses a gift, then the next person can either choose to steal it or get another one). I took a poop in a box and wrapped it in the prettiest wrapping paper and bow I could find. Everyone fought for my present, and a girl finally ended up with the poop at the end. I could hardly keep a straight face when a girl was shaking it to try and guess what was inside it.