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

同義詞：doodaddoohickeydoojiggergimmickgizmogismogubbinsthingamabobthingumabobthingmabobthingamajigthingumajigthingmajigthingummywhatchamacallumwhatsiswidget

Whatchamacallit
Whatchamacallit
Whatchamacallit?
The Whatchamacallit proces
Whatchamacallit?: The fine art of naming a company
Masks of Whatchamacallit: A Nagasaki Tale
Masks of Whatchamacallit (Nanjamonja no men, 1976)
Down there—you know . . . whatchamacallit!
Whatchamacallit-type expressions in Cantonese : analyzing mat, matje, meje, and me
On the Internet Everybody Knows You’re a Whatchamacallit (or a Thing)
Whatchamacallit: that place on Bellflower, University Circle.(let's do lunch: This month's local lunch scene pick)
The whatchamacallit : those everyday objects you just can't name : (and things you think you know about but don't)
Is It a Diary, Commonplace Book, Scrapbook, or Whatchamacallit? Six Years of Exploration in New England's Manuscript Archives