An incredibly stupid joke in which the only laughter comes from the person who told it. This is usually followed by an audible inhalation through the mouth, otherwise know as a Kenny.
Hater #1: Dude, did you hear that Bryant almost crapped his pants?
Hater #2: Yeah dude, I heard you had to make an emergency stop at Waffle House so he could get to a toilet!
Kenny Oliver: Hehe, yeah, we should call him Waffle House! (loud oral inhalation)
Haters 1 and 2: What a Derpism, Kenny is such a dumb fuck!
1. Verb - Aimlessly wandering when you could have been doing something useful.
1. Derp: Hey man, what were u doing in the market?
Herp: Nothing man. I was just derping around.
2. Mom: Stop derping around on Facebook and study.
Son: Shut up, woman.
Mom: WHAT DID U SAY??? Herp derp.. blah blah.. blah blah.... No XBox for a week.