[おわかり自由]/[食べ放題]　

okawari jiyuu / tabehoudai

free seconds

In some restaurants you can get another bowl of rice or "otsukemono(お漬け物)" for free.And "tabehodai(食べ放題)" means, "You can eat as much as you can in a fixed time."Another useful word is "nomihodai(飲み放題)", which means, "You can drink as much as you can."