To Gape

1. (intransitive) To open the mouth wide, especially involuntarily, as in a yawn, anger, or surprise.
2. (intransitive) To stare in wonder.
3. (intransitive) To open wide; to display a gap.
4. (intransitive, of a cat) To open the passage to the vomeronasal organ, analogous to the flehming in other animals.
5. (pornography) To depict a dilated anal or vaginal cavity upon penetrative sexual activity.