A way to admonish a person who derails an Internet conversation by demanding the definition for commonly used words or phrases instead of taking a minute or two to simply look it up on Wikipedia.
"Last night I was playing WoW with some friends and these two Undead Rogues came out of nowhere and ganked me."
"What the hell is WoW and what is ganking?"
"WoW = World of Warcraft, ganking = player killing. Wikipedia is your friend, dude."