noun
last order; last call
Used in bars, restaurants, and similar establishments to indicate the final opportunity to place an order before closing.
ラストオーダーは10時です。
Last order is at 10 o'clock.
ラストオーダー前に、もう一杯頼みましょう。
Let's order one more drink before last call.
Variant with interpunct, sometimes seen in menus or signs.
オーダーストップ is the point when orders are no longer accepted, while ラストオーダー is the final call before that point.
Loanword from English 'last order'.