Derp- noun/verb/adverb/adjective: a very complex infrastructure that is only accessible when the gateway to your soul has been compromised by your true emotions.
Someone who is generally awkward. Stands around awkwardly and makes everyone around him tense. A derp often is the type that tries to do something cool/risky and fails horribly the first time.
Person 1: "Whoa he managed to crash his dad's car the first time he drove it?"
Person 2: "Yeah, he's a derp."