godan verb (-nu), intransitive verb
to die; to kick the bucket
Colloquial, emphatic, and somewhat rough way to say 'die'. Often used in casual or vulgar speech, similar to 'kick the bucket' or 'croak' in English. The prefix おっ adds force.
See also: 死ぬ
あのじじい、ついにおっ死んだらしいぜ。
That old geezer finally kicked the bucket, I hear.
こんなところでおっ死ぬわけにはいかない。
I can't die in a place like this.