What is an antonym for the word classic?

There isn't one single perfect antonym for "classic," as its meaning can vary depending on the context. However, here are some options depending on the intended meaning:

If "classic" means "traditional or timeless":

* Modern

* Contemporary

* Avant-garde

* Trendy

* Faddish

If "classic" means "of high quality or excellence":

* Mediocre

* Substandard

* Inferior

* Uninspired

* Amateurish

If "classic" means "well-known or famous":

* Obscure

* Unknown

* Unremarkable

* Unpopular

The best antonym will depend on the specific context in which you are using the word "classic."