Meaning:

“纸片” means “paper,” and “人” means “person.” People use this term in two senses, either to describe those who are very slim (with bodyweight as light as a piece of paper) or to refer to a fictional character, often in games, animation or comics. The saying went viral with the popular role playing game “Evol×Love,” in which players can text, chat and call the male leads while developing their own career as a media producer. The male leads are very handsome and many players fall in love with these “paper men.”

Example:

A: 你妹妹找男朋友了没？

Nǐ mèimei zhǎo nánpéngyou le méi？

Has your younger sister found a boyfriend yet?

B: 没有，她是个动漫迷，爱上纸片人了。

Méiyǒu ，tā shì ge dòngmànmí，àishàng zhǐpiànrén le。

No. She’s a super fan of comics and animation and she’s in love with a fictional character.