Q: What does PK mean?
I've seen this internet slang online called "PK" and I think it means Person Kill or something like that, but I don't understand its meaning. Thoughts?
PK stands for "Player Kill(s)" - in the west we refer to it as PvP (Player Vs Player).
It began in MMORPG video games (even though the term is not really used anywhere else besides China), but I've seen it in TV shows and even daily speech in China, which is probably why you asked the question.