*Uh oh, Clarence Thomas is about to be put on blast with a “sexually driven” memoir written by an ex-girlfriend.

Lillian McEwen dated the Supreme Court justice back in the ’80s and is ready to tell her sensational story in a tell-all book called “D.C. Unmasked and Undressed.”

The ex, a retired administrative law judge, is finally breaking her silence after going “underground” when she told the press that Thomas was “obsessed with porn.”

The controversial book is expected to release in February by TitleTown Publishing.