Wear all white, kind of like something house painters wear... and go as "A White Lie"... You just wear that and take a black magic marker and have people at the party write lies all over you... good conversation piece too. You can start by writing a few on it yourself...
The check is in the mail
I didn't have sex with that woman
We are there for the nukes
I promise not to come in your mouth
You get the idea...