A variant of Herp Derp, Herp da Derp is:
1.) An expression when someone says something obvious.
2.) An expression for when someone says/does something stupid.
3.) A random expression usually used during an awkward silence, but can be used out of complete randomness; can also be used as a greeting.
1.)Guy1: Canada is a country.
Guy2: HERP DA DERP!

2.)Guy1: I just drove off a skyscraper on a scooter.
Guy2: HERP DA DERP!

3a.)Guy1: I'm gay.
Guy2: ........ HERP DA DERP!

3b.)Guy: -opens chat room with random friend- HERP DA DERP!
by herpdaderp:D August 19, 2010
Get the Herp da derp mug.
What one says when there is nothing else to say.
Man-"I cheated on you with your mom"
Woman-"herp de derp"
by LAbabayy April 20, 2011
Get the herp de derp mug.
a) humping the air.
b) doing the nasty.

Can be used in context of other people/things, like "herping her derp" or "herping its' derp".
a) Guy: Yo, did you see Miley Cyrus herping her derp on that award ceremony last night?
Guy 2: Yeah, looked like she was having a seizure.

b) "Yeah, I was herping my derp last night with that cheap skank, I think I have AIDS now."
by r u srs June 25, 2010
Get the herping my derp mug.
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.
by Kommandant November 25, 2009
Get the Herp Derp mug.
When two people from different cultures have an outdoor wedding and the person officiating is Jewish.
That wedding was a total herp derp.
by Jexlar January 8, 2018
Get the Herp derp mug.
the answer for every physics problem according to idiot hipsters that think they are so cool
Q: What is the force of gravity?
A: herp-derp
Teacher: you're a moron
Get the herp-derp mug.
Something idiots say. Usually it is supposed to indicate stupidity in somebody else, but the person saying it is usually the dumb one.
by Turbo_Phoenix April 26, 2011
Get the herp derp mug.