The phrase "large mouthful" means a bite or amount of food that is big or takes up a lot of space in your mouth.
Sentences with «large mouthful»
Because hamsters are burrowing creatures in the wild, they would take large mouthfuls of food from the surface into their burrows. (pethelpful.com)
By contrast, blue whales, the largest baleen whales, can lunge only a few times during a dive because they gulp down much larger mouthfuls relative to their body size, resulting in immense drag. (sciencemag.org)
Both Apple (AAPL) and Disney (DIS) have been reported as potential buyers, although at $ 50 billion, it would be a large mouthful for either one. (fortune.com)