"crackers" in the noun sense
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
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
"crackers" in the adjective sense
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"
Source: WordNet® (An amazing lexical database of English)
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