Stemmed from popular user-submission based Websites like MyLifeisAverage.com and MyLifeisHP.com, MLIHP refers to the acronym "My Life is Harry Potter", a term often mentioned by extreme fans of the Harry Potter series.
So today I walked up to a girl and said "Are you a dementor? Because you just took my breath away...", she just walked away... Must've been a Twilight fan. MLIHP
Today, a silly Muggle asked me why I was carrying around an old-fashioned "pencil." Little did he know it was actually a 9 inch oak wand with a Phoenix feather core. Silly Muggle. MLIHP.