cracker
/ˈkrækə(r)/noun
1
- a person or thing that cracks精神崩溃的人; 断裂（或裂开）的东西。
1.1
- an installation for cracking hydrocarbons（碳氢化合物）裂化器：
a catalytic cracker
催化裂化器。
1.2
- a person who breaks into a computer system, typically for an illegal purpose非法闯入计算机系统者, 黑客。
2
- a paper cylinder which is pulled apart at Christmas or other celebrations, making a sharp noise and releasing a small toy or other novelty彩包爆竹（圣诞节或其他庆祝活动上用的、内装小玩具等的小礼包, 拉开时会发出刺耳的声音）。
2.1
- a firework exploding with a sharp noise鞭炮, 爆竹。
3
- a thin dry biscuit typically eaten with cheese or other savoury toppings（与奶酪或其他咸味顶饰物一起吃的）薄脆饼干; 饼干。
3.1
- a light crisp made of rice or tapioca flour（用米粉或木薯粉做的）松饼：
prawn crackers
虾肉松饼。
4
- Brit. informal a fine example of something〈英, 非正式〉好榜样; 好东西, 精品：
don't miss this cracker of a CD.
不要错过这张精品 CD。
4.1
- an attractive person, especially a woman有魅力的人（尤指女子）。
5
- US offensive another term for POOR WHITE.〈美, 冒犯〉 同 POOR WHITE.