EXCLUSIVE
Robert De Niro has beef with Caesars Palace … really he has Kobe beef, because his swanky Nobu restaurant has been stiffed by the household.
De Niro is the co-founder of the high-end restaurant string and his company, Nobu Hospitality, is listed as a creditor in the bankruptcy case the hotel just filed. According to legal docs — obtained by TMZ — Caesars owes…