Gift parasite refers to someone who doesn't contribute anything in preparing the gift but wants to add his/her name to a gift tag in order to claim partial credit for giving the gift. They are doing this either because they are broke or because they just do not want to spend that money.
Gift parasite(禮物寄生族)指準備禮物的時候完全沒有參與或付出,卻在送禮物的時候想要在名卡上加上自己的名字,以表示這禮物也有自己的一份。他們這樣做要不是因為實在沒錢,要不就是他們壓根不想在這禮物上花錢。
For example:
I'm totally broke so I had to be a gift parasite and sign on that present you're giving Grandma.
我實在沒錢了,所以只能在你送給奶奶的禮物上蹭個名兒了。