His lips wrinkled as if a bad taste had wormed into his mouth.

Once more his lips wrinkled, his tail twitched a little.

His lips wrinkled in a sour smile that showed Blade's thrust had gone home.

His lips wrinkled back in a soundless snarl of warning.

He was stalking closer, lips wrinkled back, fangs showing.

As it saw Eddie looking, its green-black lips wrinkled back from huge fangs in a dead and vacant smile.

She demonstrated, her lips wrinkling back, her jaw thrusting out.

Yasa's lips wrinkled in her equivalent of a smile.

His lips wrinkled back on a vulpine smile, absorbing the implied insult without comment.

Her lips wrinkled back on a fanged groan of despair.