Derp (as defined by the Urban Dictionary) - A simple, undefined reply for when an ignorant comment or action is made.

Yes it's Dallas Derps!  Every week I look for something that totally qualifies as a "derp" and we talk about it! Okay this weeks derp actually goes to my roommate Zane.  And the pic says it all lol!  Who has a toaster in they're bathroom over the toilet?  WE DO!  Yup, never a dull moment at the Chambers Palace!  Tell me about the derps you see!  Something that just makes you go  DERP!