a ticket from the dictionary police

What makes a word a real word?

But if all these words look wordish, sound wordish, and act wordish, why are they all hedged about with the namby-pamby "I know it's not a real word" disclaimers? (Note: wordish is a perfectly good word.) We all know that there are words that no one can complain about (when was the last time you heard a grammar rant about apple or Tuesday or fair?) and words that almost everyone finds offensive (no need to print them in a newspaper). What we don't have a firm grasp on is the acceptability of a wide range of other words, especially words we've hung affixes on. Redness is OK, but what about grossness? Heroism is fine, but what about thespianism? We have similar problems with words that have undergone a shift in function or part of speech ("shopping at thrift store" becoming thrifting, anonymous becoming verbed as anonymize), nonstandard forms (funner, huger, interestinger), and, of course, any slang words someone hasn't personally heard or used (chillaxing, wackaloon). What does a word have to do to be a "real word"?