What is Re-gifter?
A person who gives things they received from others as gifts. They take what was given to them and send it to someone else out of laziness and spite.
I think he gave you the same book I bought him for Christmas. He is a damn re-gifter!
One who receives a gift from someone, does not like it, so he/she gives to someone else for his/her birthday christmas etc.
Elain accused George of being a re-gifter after she found out that George had given the gift to his girlfriend for her birthday.