Halloween ideas anyone?

I am 20 yr old and work at a bank. I need a good costume idea that is not distasteful and not offensive. I would like to be something creative, but not too creative because i don't want to spend all day explaining to my customers what exactly i am. I like to be funny but anything thats cool would work. Also, i want to stay away from the "Halloween cliches" (i.e. vampire, werewolf, etc.)