An expression used when a person, or yourself, has done somthing extremely stupid and dopey
Person 1: Dude, I just hit my head on the door.
Person 2: HERP DERP.
Another way of saying duh.
Stacey: I ordered the food, it will be here in 10 minutes.
Louise: okay when will it be here?
the answer for every physics problem according to idiot hipsters that think they are so cool
Q: What is the force of gravity?
Teacher: you're a moron
A word used for complete randomness.
Alex: I'm bored. Herpderp.
Herpderp is the smell of herpadermis.
Being able to smell ones face in the case they have herpes of the face.
The process of facial screening before sexual intercourse of the face
"i had to herpderp her face with my tongue to make sure she was clean
My boyfriend, Abe, is a herp derp!
Something idiots say. Usually it is supposed to indicate stupidity in somebody else, but the person saying it is usually the dumb one.
Herp derp look at this noob.