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

同義詞：doodaddoohickeydoojiggergimmickgizmogismogubbinsthingamabobthingumabobthingmabobthingamajigthingumajigthingmajigthingummywhatchamacallitwhatchamacallumwidget

Whatsisname?
The Deep Whatsis
The Deep Whatsis
Exit Dr. Whatsisname
Whatsisname: The Greatest Writer Ever
I'll Never Forget Whatsisname
I'll Never Forget Whatsisname
WHATSISFACE: human facial composition by computer graphics
Classical Blather: Whatsisnames and Thingamajigs
The Diary: Welcome to Your New Leader, Whatsisname