Hey guys, you are wonderful, thanks. This re-wording 'Stop smile(ing) and drop (remove, take off) your clothing' makes me think about the following explanation: Stop smiling because you lost, I am the winner, I found them. And take off your clothes, as they are a part of the (imaginary) stake, the winner takes all. And he probably uses the words from the song to be more funny, to speak in verses like a poet.

In case you did not read it yet, here is a brand new interview with Cameron. He confirms the 4 years old rumor about him and Scott thinking about Alien 5 and in one breath he also adds that this case is closed now.
http://www.aintitcoolnews.com/display.cgi?id=22405
(If I have got a child, I will offer it to him too to force him to rethink his decision...)