doodah
noun /ˈduːdɑː/
/ˈduːdɑː/
(British English) (North American English doodad
(informal) /ˈduːdæd/
/ˈduːdæd/
)- a small object whose name you have forgotten or do not know
（忘掉名称或叫不出名目的）小装置，小玩意儿 词源early 20th cent. (in the phrase all of a doodah): perhaps from the refrain of a song called Camptown Races.