whatchamacallit

(ˈʍətʃəməˈkɑlɪt)

n. a name for a person or thing whose real name has been forgotten or is being avoided. I lost my—you know—my whatchamacallit—my watch!

Name	Pronounced	Usage
Paraskeva	-	Bulgarian, Macedonian
Sana	-	Arabic
Saif Al-Din	-	Arabic
Tobiah	to-BIE-ə (English)	Biblical
Aina (2)	IE-nə	Catalan
MelÁNie	-	Czech