What does it mean to Biting tongue in sleep spiritual meaning? Many people bite their tongues and lips while sleeping. Biting your tongue in sleep may be a sign of divine protection, like a guardian angel or higher power. Instead of speaking, be still and listen. If you have been reveling too much information and your words could get in trouble, you may end up biting your tongue as a way to signal that it is time to speak less and listen more. When you bite your tongue in sleep, you are on the verge of giving away too much information, and doing so can come back to bite you.