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
Estelle	es-TEL	English, French
Petre	PE-tre (Romanian)	Romanian, Macedonian, Georgian
ÉVelyne	-	French
Bastet	BAHS-tet (English)	Egyptian Mythology
Thulani	-	Southern African, Zulu
Iseul	-	Korean