Tentacles coming from inside the mouth as a part of the person's body. If they come out of the mouth from the anus, use All The Way Through instead.
Often depicted with the character Undertaker (Elden Ring) from Elden Ring.
Examples
Not to be confused with:
- Tentacles going into the mouth.
- Tentacles going through from ass to mouth.
- Tentacles with mouth(s) on them.
- A mouth hidden under/surrounded by/made of tentacles.