頬ほお袋ぶくろ

noun

cheek pouch

Refers to the expandable cheek pouches of animals such as hamsters, squirrels, and some monkeys, used for temporarily storing food.

• ハムスターは頬ほお袋ぶくろにたくさんの餌えさを詰つめ込こむ。

  Hamsters stuff a lot of food into their cheek pouches.