Gift parasite1 is a person who adds their name to a gift tag in order to claim partial credit for giving the gift.
礼物寄生虫指的是把名字加在礼物标签上写的送礼物人名单里,以便能沾到一点功劳。
Example:
I'm totally broke so I had to be a gift parasite and sign on that present you're giving Grandma.
我彻底没钱了,所以我只能做个礼物寄生虫,在你送给奶奶的礼物上加个名字。