whatsis

and whatsit and whatzit and whazzit (ˈʍətsɪs and ˈʍətsɪt and ˈʍətsɪt and ˈʍəzɪt)

n. a name for a person or thing whose real name has been forgotten or is being avoided. Put this little whatzit on the top and another on the bottom.

Name	Pronounced	Usage
Grga	-	Croatian
Chryses	-	Greek Mythology
Silvestro	seel-VE-stro	Italian
Polona	-	Slovene
Xander	KSAHN-dər (Dutch), ZAN-dər (English)	Dutch, English (Modern)
Italus	-	Roman Mythology