ガブッと

adverb

chomping; gulping; with a big bite

Mimetic adverb describing the sound or action of biting or swallowing something vigorously, often in one large mouthful.

• 犬いぬが大おおきな肉にくをガブッとくわえた。

  The dog chomped down on a big piece of meat.

• 彼かれはハンバーガーをガブッと一ひと口くちで食たべた。

  He gulped down the hamburger in one big bite.