他乜斜着眼睛，撇了撇嘴。

He squinted with his mouth twitched.

还不单单只是她撇嘴的表情咧。

Not just when she opens her mouth, if she ever does. Speaking of…

他母亲冲他撇了撇嘴，于是他换了个话题。

His mother's lower lip was coming at him, so he changed the subject.

他不屑地一撇嘴，一摊手，一耸肩：当然不是。

He shrugged and said scornfully: Of course not.