Butthurt
Butthurt is that special feeling in your ass after it's been kicked and/or fucked. It is a common ailment amongst losers on the internet. It is usually characterized by noisy whining and complaining after being pwnt or otherwise outdone in any minute and insignificant way. It was invented at least 100 years ago by Vlad the Impaler when he went crazy from living in a time without the internets. Today, butthurt occurs most commonly when you fall asleep with your friends and they, being your friends, decide it would be funny to sodomize you. Butthurt is also a primary generator of lulz on the internets and has produced many lolcows.