A guy I knew started saying this earlier this eyar, and it still cracks me up. It is:

This is gayer than George Michael meets Michael Jackson!

Another one I heard on radio recently is a classic:

Keefy the Weatherman - Now, Jarvy, there's no need to be disrespectful!
Javy Harvison - Course there is! That's why we're here!
Keefy - Yes, I forgot!

And there's that one I heard last week:

Well I gotta put it to ya kid, you're a real horse's a$$!

Got any personal faves?