Worse gift ever given to me was when I was 10 y.o. We had X-mas at our house and I opened a present that my aunt gave me and it was a new cordless phone. I was like "yay a new phone". I thanked her and all but then I opened the box and inside was a 6 pair pack of tube socks and a couple of 2 packs of reese's peanut butter cups. Oh boy was that embarrasing.
Worse gift I have ever given somebody was the flu. :(