showing or expressing sarcasm sarcastic comments a sarcastic manner ‘There's no need to be sarcastic,’ she said. Word Origin late 17th cent.: from French sarcastique, from sarcasme (see sarcasm), on the pattern of pairs such as enthousiasme, enthousiastique.Extra examples His tone was lightly sarcastic. He looked up and forced a sarcastic smile. Her tone was faintly sarcastic. She was waiting for him to make some sarcastic comment. There’s no need to be sarcastic.