duff

1. N a thick flour pudding, often flavoured with currants, citron, etc, and boiled in a cloth bag 水果布丁

plum duff

N

1. V to change the appearance of or give a false appearance to (old or stolen goods); fake 把(旧的或偷的东西)翻新; 伪造[slang]

2. ADJ bad or useless, as by not working out or operating correctly; dud 无用的[英国英语] [非正式]

a duff idea

a duff engine

ADJ

1. N the rump or buttocks 屁股[slang]