Phrase used after something completely obvious is stated, usually to provoke someone.
Gary: "Did you guys know that the Alphabet Song and Twinkle, Twinkle Little Star have the same tune?!"
Stef: "Derp der on the der der!"
DJ: "Gary, sometimes I wonder why I hang out with you."
The whiskers that develop after a few days without shaving, commonly because of laziness or just not caring.
My girlfriend told me I should either shave or grow a beard, because my mehskers were annoying her.