doohickey

noun

1. 那玩意儿（指忘掉名称或叫不出名目的小装置等）
   a small object whose name you have forgotten or do not know, especially part of a machine

1. This here doohickey is in violation of the city's new vehicle code.
   这个玩意违反了城市新的交通工具法令。
2. Now I am smoking a plastic doohickey known as "No.9," an electronic cigarette.
   我现在吸的是塑料装置的被称为9号的一种电子香烟。

noun

1. something unspecified whose name is either forgotten or not known
   1. she eased the ball-shaped doodad back into its socket
   2. there may be some great new gizmo around the corner that you will want to use

   Synonym:    doodaddoojiggergimmickgizmogismogubbinsthingamabobthingumabobthingmabobthingamajigthingumajigthingmajigthingummywhatchamacallitwhatchamacallumwhatsiswidget