裏うらメニュー

noun

secret menu; off-menu item

Refers to dishes or services that are not listed on the regular menu but can be ordered by those in the know. Often used in restaurants, bars, and other service establishments.

• この店みせには常じょう連れんだけが知しっている裏うらメニューがある。

  This restaurant has a secret menu that only regulars know about.

• 裏うらメニューのラーメンはすごく辛からいらしい。

  I heard the off-menu ramen is incredibly spicy.