An act of violence performed by one who is angry about their friends or family not hosting a server for anything that can be found on a server (such as Minecraft, Battlefield 3, file-sharing, etc.), hosting it and not telling them but telling all their other friends/family, or any reason you can imagine somebody would be angry at a person for doing or not doing something that involves a server.
Person 1: "John just bitched at me for not telling him our Minecraft server address, and then punched me in the face. What the fuck?"
Person 2: "Yeah, I wouldn't put it past him to server punch people."
Person 1: "So I was talking to Will the other day and then Mark suddenly comes up and punches me, then tells me to keep him in-the-know when the file-sharing server dies."
Person 2: "Ouch. Sucks to get server punched."
Person 1: "What the fuck? Why did Gary just punch me in the face?"
Person 2: "Sorry for the server punch, dude. He's pissed off about his favorite Planetside 2 server crashing during 5 operations in a row."