Non-coreligionist- Anyatīrthika (a heretic) whose philosophy, outfit and Sāmācārī (rules of conduct qua etiquette, formality and convention) cannot be approved of.
samanojño dṛṣṭito liṅgato, na tu bhojanādibhiḥ, tasya, tadviparītastvasamanojñaḥ śākyādiḥ.
(Ā 8.1 Vṛ Pa 240)