Our cat is a sneaky biter. She will be just playing; then she gets this naughty look in her eyes and we later find long red scratches on our arms. - We first named her “Lambchop”, then the neighbor kids started laughing and guffawing at us calling “Lambchop” (and she would never answer to that name anyway - we’d already tried “Zippy” - and the only name she would agree to answer to is “Brutus”). So, “Brutus” it is; I don’t like it, but that’s it. At least, the neighbor kids don’t make fun of it.
She isn’t sneaky, you see that ‘funny look’ on her face. She is over stimulated, same type of aggression as petting aggression. The trick is to not get to that point and stop way before ‘that look.’