As hungry as a bear.
Bears hibernate all winter long and when they are done hibernating, they are starving!
This is where the term hungry as a bear comes from.
A person may be known to be as hungry as a bear if they are extraordinarily hungry. Bears may spend anywhere from 5 -7 months
hibernating. Before they go into hibernation mode, they spend a great deal of
time eating. They increase their food intake to pack on the pounds so that they
can sustain the hibernation period. While they are hibernating, they have nothing
to eat or drink. When springtime arrives, bears awake very hungry. When camping,
people need to make sure their food is packed away carefully. Bears have an incredible
sense of smell and are very curious. This coupled with their fierce appetite
can cause problems for campers. That is why when people are very hungry; we sometimes
compare their hunger to that of a bear.