The phrase "insatiable hunger" refers to a never-ending or uncontrollable desire or need for something, typically food or knowledge. It means that no matter how much is consumed or obtained, the feeling of satisfaction is never achieved.
Mindless vicious creatures with insatiable hunger for human flesh. (slickstermagazine.com)
Overexploitation of this lucrative market and the nearly insatiable hunger of Swedish immigrants essentially wiped out the wild featers. (discovermagazine.com)
But smart fueling will help you deal with insatiable hunger while you are training for you big event. (wholehealthnutritionvt.com)