1. (

• cracker

) a thin crisp wafer made of flour and water with or without leavening and shortening; unsweetened or semisweet ;

2. (

• redneck ,
• cracker

) a poor White person in the southern United States ;

3. (

• cracker ,

) a programmer who cracks (gains unauthorized access to) computers, typically to do malicious things; "crackers are often mistakenly called hackers" ;

4. (

• firecracker ,
• cracker ,
• banger

) firework consisting of a small explosive charge and fuse in a heavy paper casing ;

5. (

• cracker ,
• snapper ,
• cracker_bonbon

) a party favor consisting of a paper roll (usually containing candy or a small favor) that pops when pulled at both ends ;

1. (

• balmy ,
• barmy ,
• bats ,
• batty ,
• bonkers ,
• buggy ,
• cracked ,
• crackers ,
• daft ,
• dotty ,
• fruity ,
• haywire ,
• kooky ,
• kookie ,
• loco ,
• loony ,
• loopy ,
• nuts ,
• nutty ,
• round_the_bend ,
• around_the_bend ,
• wacky ,
• whacky

) informal or slang terms for mentally irregular; "it used to drive my husband balmy" ;