Diabólica (en. Diabolical)
/diaˈβolika/
Slang Meanings
Derogatory use to refer to a very cunning person.
She is so diabolical that she always comes out on top in business.
Es tan diabólica que siempre sale ganando en los negocios.
Refers to a clever but unethical plan.
That strategy is diabolical, but very effective.
Esa estrategia es diabólica, pero muy efectiva.