whachamacallit

/hwuhch-uh-muh-kawl-it, hwoch-, wuhch-, woch-/US // ˈʰwʌtʃ ə məˌkɔl ɪt, ˈʰwɒtʃ-, ˈwʌtʃ-, ˈwɒtʃ- //

汪洋大海,汪洋大海中,汪洋大海中的小船,汪洋大海中的小鱼

Definitions

n.名词 noun

1
Informal.
- : an object or person whose name one does not know or cannot recall.