[a2014]

Originally Posted by korean

http://baike.baidu.com/item/%E5%B0%8F%E4%B8%89/7035


小三，是通过互联网流行起来的一个词，是对第三者的蔑称。
第三者在中国法律上的含义是指背弃道德三观，凭自己个人喜好，肆意插足他人情感生活，破坏原有夫妻、情侣关 系的人。

It is as simple as that. By definition, no legal binding is needed for such definition

This is because the information is being generalized. So long as third party involved this is it. Indeed there is a difference between FB and 小三, no doubt not so distinctly differentiated.

Well I am not here to argue over the terms as different individual perception of things are different depending on the environment he/she is in.

Cheers.