I can't believe I've never taught a student the word "thingamajig". It's so versatile and every English speaker needs to use it at some point. What was I thinking?
Incidentally, "thingy" and "wotsit" can also be used. "whatchamacallit" will be understood but it's a bit American.
whatchamacallit = what do you call it?
In our own languages, we have a word or phrase we use as a substitute when we don't know or can't remember the word we want to use.
ElComoSeLlama ๐ช๐ธ
ChuvaEklavush ๐ต๐ญ
Grejselimojs ๐ธ๐ช
Tenteges ๐ต๐ฑ
Vattelapesca๐ฎ๐น
elbetaa ๐ช๐ฌ
Shusmouh (ุดุณู
ู)๐ธ๐ฆ