Translation of "'sneer'" in Japanese

He curled his lip in a sneer.

彼は軽蔑したように唇をゆがめた。

"No, no! That isn't the smiling face we are looking for." It was a 'smirk' either that or a 'sneer'.

「ちがうちがう僕らは求めてる笑顔はあんなじゃない」　それは『嗤い』もしくは『嘲笑』。