Used to be cool

Lcp
So totally random but does anybody have any idea on what would be a cool thing to dress up as at a party with the theme 'used to be cool'? 
I want to dress as something funny and different to what everyone else will be doing! But it has to be something semi easy to put together as I live 5 hours away from the nearest city haha 
ANY IDEAS???? Thanks  🤘🏻😄😄