The Prophet ﷺ never used bad language neither a "Fahish nor a Mutafahish. He used to say "The best amongst you are those who have the best manners and character." (See Hadith No. 56 (B) Vol. 8) (Using translation from Bukhārī 3559)

«لَمْ يَكُنْ رَسُولُ اللهِ ﷺ فَاحِشًا وَلَا مُتَفَحِّشًا»