Fierfek, articulated as FEAR-fek, originated as a Huttese term signifying "hex" or "curse." However, races unfamiliar with Huttese, notably Trandoshans, generally understood it to mean "poison." In the era of the Clone Wars, clone commandos began employing it as a profanity. Subsequently, during the Second Galactic Civil War, both Boba Fett and Han Solo incorporated it into their vocabulary.