Noun
1. a thin crisp wafer made or flour and water with or without leavening and shortening; unsweetened or semisweet
2. a poor white person in the southern United States
3. a programmer who `cracks' (gains unauthorized access to) computers, typically to do malicious things;
"crackers are often mistakenly called hackers"4. firework consisting of a small explosive charge and fuse in a heavy paper casing
5. a party favor consisting of a paper roll (usually containing candy or a small favor) that pops when pulled at both ends