cheekful

noun

1. A partial mouthful, enough to fill one's cheek.

   “I stop at one of the largest of these pools, undress and plunge in. Happily I flounder about, terrifying the minnows, and float on my back and spout cheekfuls of water at the sun.”

   “Jenkins hit the ground hard enough to come up with cheekfuls of sand, despite the mouth guard FCPO Healy had insisted they all wear.”