1. 便宜货：donor 捐赠人 | doodad 便宜货 | doodle 混时间

2. 美观而无用之物：dontlinger 不要徘徊 | doodad 美观而无用之物 | doodad 小玩意儿

3. (忘了名的)小玩意,小装饰品：dig 苦干,苦学; | doodad (忘了名的)小玩意,小装饰品; | dorm 宿舍;

4. 小玩意儿：doodad 美观而无用之物 | doodad 小玩意儿 | doodle 涂鸦

noun

1. something unspecified whose name is either forgotten or not known

e.g. she eased the ball-shaped doodad back into its socket
there may be some great new gizmo around the corner that you will want to use

Synonym: doohickeydoojiggergimmickgizmogismogubbinsthingamabobthingumabobthingmabobthingamajigthingumajigthingmajigthingummywhatchamacallitwhatchamacallumwhatsiswidget