noun, noun or participle which takes 'suru', intransitive verb
vomit; puke
Colloquial noun and suru-verb for vomit or the act of vomiting. Crude; used in casual speech.
飲みすぎてゲロしちゃった。
I drank too much and puked.
道にゲロが落ちてた。
There was vomit on the street.
noun, noun or participle which takes 'suru', intransitive verb
confessing; spilling the beans
Slang for confessing or revealing something under pressure, often in a criminal or interrogation context. Used as a suru-verb.
警察でゲロって全部話した。
He spilled the beans at the police station and told everything.
prefix
Colloquial prefix used for emphasis, often with negative or extreme adjectives. Roughly equivalent to 超 or めっちゃ.
あの映画、ゲロつまんなかった。
That movie was extremely boring.
ゲロまずいラーメンだった。
It was really awful ramen.