a term used to refer to an object or thing whose name is unknown or forgotten

ऐसा वस्तु जिसका नाम ज्ञात नहीं है

English Usage: "Could you pass me that whatsit over there?"

Hindi Usage: "क्या आप मुझे वह क्या सोचना है वहाँ दे सकते हैं?"