An onomatopoeic adverb meaning to gulp something down in one or to indicate a strong, forceful motion such as tightening or pushing.
のどが渇いていたので水をぐうっと飲んだ。
I was thirsty, so I gulped down the water.
合格発表を見て胸がぐうっと熱くなった。
Seeing the results made my chest swell with emotion.
ネジをぐうっと強く締めて固定した。
I tightened the screw with a strong twist to secure it.
コーヒーをぐうっと飲んで仕事に戻った。
I gulped down the coffee and returned to work.