sneer
verbUK /snɪə/
US /snɪr/
To smile in a mean way that shows you think someone is silly or not good enough.
He sneered at my drawing and said it looked like a mess.
OTHER MEANINGS
2. A mean, mocking smile or remark that shows disrespect.
She answered with a sneer that made everyone uncomfortable.
3. To speak about someone or something in a mocking, disrespectful way.
The critic sneered at the new movie for being too simple.
4. To show open contempt through facial expression or tone.
He sneered when the teacher praised the easy answer.