Death or a deadly situation. This phrase is sometimes said as "out of the jaws of death," and it's frequently used to mean a person escaped from a very dangerous situation.
The origin of this phrase is unclear. However, it may originate from dangerous animals, such as lions, bears, and hippos. There are plenty of wild animals like these that have the potential to harm or even kill humans by using their powerful jaws and sharp teeth. Alligators, for example, can close their jaws with such force that it could easily break the bones of a human.
Anyways, this phrase has existed for at least 400 years, as it was used by William Shakespeare in the play Twelfth Night, which is believed to have been written around 1601-02:
"This youth that you see here I snatch'd one half out of the jaws of death."
Note: The origins for most idioms and popular sayings cannot be said with a certainty. What's provided are theories that may be plausible to how a phrase originated, but not necessarily so.
In addition, quotes that contain a particular phrase may be taken from old newspapers, poems, or books that were written centuries ago, but this by no means confirms that the phrase originates from said newspapers, poems, or books. In all likelihood, if an expression is being used in a newspaper, it's probably already a well known saying and is from an older time.
* Dan slipped off the edge of a cliff and was now hanging on the edge yelling for help. His brother, who was nearby, heard him and helped to lift him back up to safety. Dan told his brother that he lifted him from the jaws of death.