Overtain
drinking in excess of maintaining your buzz or perfect level of intoxication.
Hey man, if you keep slamming those shots of tequila you're going to overtain and pass out.
Overtained
Overly entertained to the point of being a non-contributing member of society. Having more knowledge of Paris Hilton, Brad Pitt and American Idol than Paris, France, pit mining and American government. Too wrapped up in "bling" to notice our steady march towards fascism.
American is the most overtained society in the world. It is what has allowed for the transformation of media into sound-bytes and misinformation with hardly an outcry.