OH NO.. look what I found.. Was this person being clever? NOOOO... say it ain't so. Online messaging term used when Telling or correcting someone, while also slightly trolling them with the act of mis-spelling "learn". People who reply with "learn To Spell" instantly lose the argument. "Lern 2 Spelz" (for when they misspell something) "lern 2 Grammar" (for poor grammar situations) "lern 2 sumz" (for math fails) https://www.urbandictionary.com/define.php?term=Lern