buck¹/bʌk; bʌk/ n [C] 1AmE, AustrE spoken a dollar 【美，澳，口】元: Could you lend me 20 bucks? 你能借 20 元给我吗？ 2 pass the buck to try to make someone else responsible for something that you should deal with 推卸责任: You can't keep passing the buck! 你不能一直推卸责任！ 3 the male of some animals, for example DEER and rabbits 雄鹿; 雄兔 4 buck nakedAmE spoken wearing no clothes 【美口】 赤裸的: Sean was standing outside, buck naked. 肖恩赤身裸体地站在外面。