dud
n
(infml 口) thing or person that fails to work properly 無用的物或人; 廢物
Two of the fireworks in the box were duds. 盒子里的煙火有兩個是壞的.
The new manager is a complete dud. 新經理完全是個廢物.
This battery is a dud. 這電池是廢的. dud, adj defective; worthless 有缺點的; 不完善的; 無價值的; 無用的
a dud cheque, ie one that is forged or not backed by cash 無用的支票(假支票或空頭支票).