Diabolique (en. Diabolical)
/djablɔlik/
Slang Meanings
A pernicious act or idea.
His idea was so diabolical that no one saw it coming.
Son idée était si diabolique que personne ne s'y attendait.
Describes someone as very intelligent but immoral.
This little genius is diabolical in his strategies.
Ce petit génie est diabolique dans ses stratégies.