1. (noun) A Mcderp is a person who habitually regurgitates psuedofacts, slogans, or platitudes that they hear or see in popular media, often getting them wrong because they don't understand what they mean. Mcderp are created from excessive exposure to popular media outlets, particularly the internet.
Joe told me the Obama was a closet Muslim. He read it on a forum.
Yeah. He told me the world is going to end in 2012. Joe is such a fucking Mcderp.