What is it called when someone is talking and cracking a smile at the same time, but in a way that only one side of the mouth is moved upward, like those villians in japanese mangas?
Learn English – Word identification – unfriendly smile while talking
single-word-requests
Best Answer
"Sneer" fits that description:
Edit: Image of Billy Idol who was famous for his sneer: https:www.blindfiveyearold.com