A pussy kill is when someone gets a lucky kill on you in a game after you beat the player many times. Mostly you will know if someone pussy killed you because you beat them in a game like a thousand times and once that player finally gets one kill on you the player will rub it in your face and the player will most likely say something over used and salty like "haha get rekt nub" or "Ez" then the player will leave in rage thinking he won because he got the last kill. Mostly pussy killers are salty try-hard 15 year olds or younger. They are commonly in Roblox or sometimes Call of Duty or any other shooter game. Like I always say, it does't matter who got the last kill it only matters who got the most kills.

when you're hungover as shit after a spending a night drunk as a skunk

With "pussy kill" we define the act of entering the pussy, typically wet, with any action that is entailed by a sexual intercourse.

A pussy killer is also generally referred to as a player.