Quote Originally Posted by Llus View Post
Late Latin toxicus, from Latin toxicum poison, from Greek toxikon arrow poison, from neuter of toxikos of a bow, from toxon bow, arrow

First Known Use: 1664


https://www.merriam-webster.com/dictionary/toxic
Quote Originally Posted by Zojha View Post
Mhm... the term "toxic" to describe player behavior has primarily been coined by Riot Games
The MMO term for it, not the actual term for it.