doohickey
/ˈduːˌhɪkɪ/noun
(pl. -eys)
- N. Amer. infor-mal a small object or gadget, especially one whose precise name the speaker cannot recall〈北美, 非正式〉（尤指记不起确切名称的）小玩意儿, 小器具：
a garage filled with electronic parts and other valuable doohickeys.
一个满是电子零件和其他值钱玩意儿的汽车库。
词源