Rohan has a feeling that Josuke is cheating at cee-lo, and cuts off his own pinky. If he is unable to figure out Josuke's trick in the next round, he says he will pay him 2 million yen to have him use Shining Diamond to fix his finger. But if Rohan does figure it out, he says he'll take Josuke's pinky instead. He even calls Tamami to act as a mediator, having him use his Stand ability so Josuke can't play fairly the next round, either.
I won't let a doofus like you 
underestimate the great Rohan!
لن أدع جاهلاً مثلك يستهين بروهان العظيم
Ein kleiner Hirnkastrat wie du soll
den großen Rohan nicht unterschätzen!
¡No dejaré que un idiota como tú
subestime al gran Rohan!
¡No dejaré que un idiota como tú
subestime al gran Rohan!
Je ne laisserai pas un débile
dans ton genre se payer ma tête !
Non esiste che un imbecille come te
possa prendersi gioco del grande Rohan!
Não deixarei que um palerma como
você me subestime!