whatchamacallit
US /ˈwɑː.tʃə.məˌkɑː.lɪt/
UK /ˈwɑː.tʃə.məˌkɑː.lɪt/
1.
cái gì vậy
used when you are speaking about something or someone whose name you can not remember:
:
•
I need a - a whatchamacallit - one of those things that you can caramelize sugar with.