godan verb (-ru), intransitive verb
Derogatory or rough way to say 'die'. Used in anger, contempt, or casual rough talk. Not used in polite or formal contexts.
あんなやつ、さっさとくたばれ。
That guy can just drop dead.
こんなところでくたばってたまるか
No way I'm gonna die in a place like this.
godan verb (-ru), intransitive verb
be exhausted; be dead tired; be knackered
Colloquial and rough expression for extreme physical fatigue. Often used by men in casual speech. Not suitable for formal situations.
残業続きでもうくたばったよ。
I'm dead tired from all this overtime.
一日中歩いてくたばりそうだ。
I walked all day and I'm about to collapse.