We you Accomplish something so stupid, you get hard.
Rednecks get a derp boner when someone says “here, hold my beer!”
To be scared and cough at the same time
"Kevin almost died, he started to derp so hard."
When one takes a dick pic on Snapchat and makes a person out of his penis with emojis and drawings on it.
I got bored so I started to dick derp on Snapchat.
when you get turned on by Moist Criktial (popular streamer) and yell TURBOOO while being a derp
"ive been turbo derping ever since I saw that ceramics video"
Shot right in the face at close range with a large caliber gun.
2. Made a stupid mistake.
Mike Just got derped with a 12 gauge shotgun.
Aaaaaaaaaaaaaaggggghhhhhhh! I derped!