also: クラッカ
noun
A crisp, savory biscuit, often eaten with cheese or dips.
ワインのお供にクラッカーを食べた。
I ate crackers with my wine.
noun
party popper; cracker (toy)
A festive item that makes a popping sound and releases confetti or small toys when pulled apart.
誕生日パーティーでクラッカーを鳴らした。
We pulled party poppers at the birthday party.
noun
A person who breaks into computer systems, often with malicious intent. Less common than ハッカー.
そのクラッカーは企業のサーバーに侵入した。
The cracker broke into the company's server.