crackers

名词 cracker:

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

形容词 crackers:

1. informal or slang terms for mentally irregular
   同义词：balmy, barmy, bats, batty, bonkers, buggy, cracked, daft, dotty, fruity, haywire, kooky, kookie, loco, loony, loopy, nuts, nutty, round the bend, around the bend, wacky, whacky

1. Some of my friends like soda crackers.
   我的一些朋友喜欢苏打饼干。
2. The boys light crackers in the street.
   男孩们在街道上放鞭炮。

crack.ers

adj.Chiefly British （形容词）【多用于英国】
Insane; mad.
疯狂的；发疯的

来源：
Probably from cracker [breakdown]
可能源自 cracker[崩溃]