1. thin, crisp baked wafers or biscuits, often eaten with cheese or soup
Usage: plural of cracker
2. small explosive devices that make a popping sound when pulled apart
Usage: British; plural of cracker

1. crazy or insane
Usage: British; informal

Examples

• She served cheese and crackers as an appetizer.
• The soup came with a packet of saltine crackers.
• The children pulled Christmas crackers at dinner.
• Each cracker contained a small toy and a joke.
• He’s absolutely crackers if he thinks that will work.
• The whole idea sounds completely crackers to me.
• We bought a variety pack of different crackers.
• The crackers made loud pops when we pulled them apart.