What is Derping?
1.
1. Internet slang for trolling.
2. In traditional gaming jargon, engaging in a discussion that goes way outside likelihood or canon without any serious intent.
See also
1. Do you actually believe that Twilight is the best ever or are you just derping?
2. "You were saying Wizards of the Coast will bring back halflings as the true beloved of Ao?" "Nah, I was just derping."
See