A 'Herpendra', is the name given to the duplicate that is created, when a future self travels back in time and co-exists with its present self.
Daniel travelled back in time to find out who slipped the love letter into his bag. Daniel must be careful that his herpendra does not interact with his original form whilst he does so; otherwise the future could be altered.
Herpderpes is a sexually transmitted case of stupidity, symptoms of this include general herping and derping, and is not limited to brain farts and mind queffs. Can be extremely contagious during the early onset of the disease, and has no cure.
Used to describe someone who is in denial over his or her herpes or downplays them. Though a large blister on the corner of their mouth appears, they will demote it to a “canker sore” all the while telling you it is not contagious. Do not leave any open cups around this person, as they may drink out of it without giving it a second thought and thus spread the virus. Herpenialists are most contagious at the bar. They may attempt to make-out with you in complete disregard to any lesions affecting their oral regions.
Ralph: Michelle told me that her blistered lower lip was from drinking too much orange juice.
Dan: You can't trust her, she's a herpenialist. She had a huge sore on the side of her face last month. How do you explain that?
Ralph: Shit, I made out with her at the bar last night!!
A Herpderpington is an individual who enjoys photobombing people's photos by making the typical Herp Derp face (or equivalent). This can either be done as a joke to be funny, or done to be an asshole. Usually, Herpderpingtons act as a group, so the name comes from a play on words on a family name or last name.
It is also the official title for those who herp derp.
Some of my friends were photoboothing before class when suddenly the Herpderpingtons photobombed us.. but the picture ended up being really funny!