cracker

详细解释:n. 饼干, 爆竹
【计】 破袭者
【化】 裂化器; 裂解器; 裂化装置; 裂解装置

英语解释：

名词 cracker:

a thin crisp wafer made of flour and water with or without leavening and shortening; unsweetened or semisweeta poor white person in the southern United States同义词：redneck