What's a fun way to cover up a nasty poster?

In the room of my study’s students society, some people have put up a poster on the wall. It’s nasty. No really, don’t click that.

Anyway, because we found it wasn’t the prettiest sight, me and some friends cut a bra out of a magazine and plastered that over the poster. That was fun and it stayed up there for a while, but it was recently removed.

Now, because it has nostalgic value (it’s sort of a souvenir), I don’t want to remove it or damage it. However, I would really like to cover it up again, and since doing the same thing again isn’t really fun anymore, I thought I’d consult the Fluther community for original, fun ways to cover up this poster.

PS. I should be writing an essay right now, but as you can see, I clearly have more important things to do.