After having played Fortnite Battle Royale for a while, I have heard the term "thirsting" come up numerous times. It's typically used when playing in squads, where the act of "thirsting" is killing a downed enemy player while one or more of their teammates are still alive.
From my experience, the connotation of "thirsting" seems to be more negative than positive. That said, I feel as if I've heard the term somewhere when playing PUBG before, and it seems to be a term I've only heard recently with the genre trend of battle royale.
Where did this term originally originate from?