穷困的“礼物寄生族”

集体凑钱给某人买礼物的时候，有些手里不宽裕或者着实不肯出钱的人，总是缩在后面；可到了送礼物的时候，他们却积极走在前面，在礼品卡上加上自己的名字，表明自己也是送礼物的人之一。

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（礼物寄生族）指准备礼物的时候完全没有参与或付出，却在送礼物的时候想要在名卡上加上自己的名字，以表示这礼物也有自己的一份。他们这样做要不是因为实在没钱，要不就是他们压根不想在这礼物上花钱。

For example:

I'm totally broke so I had to be a gift parasite and sign on that present you're giving Grandma.
我实在没钱了，所以只能在你送给奶奶的礼物上蹭个名儿了。

（中国日报网英语点津 Helen）