adverb, adverb taking the 'to' particle
throwing up; vomiting
Mimetic adverb describing the sound or action of vomiting. Often used with と.
彼はげろげろと吐いた。
He threw up with a retching sound.
Onomatopoeia for a frog's croak. Often used with と.
カエルがげろげろと鳴いている。
The frog is croaking.
interjection
gross!; yuck!
Interjection expressing disgust, often in reaction to something unpleasant or vomit-related.
げろげろ！こんなもの食べられないよ。
Gross! I can't eat something like this.