whatsis

[ hwuhts-is, hwots-, wuhts-, wots- ]
/ ˈʰwʌts ɪs, ˈʰwɒts-, ˈwʌts-, ˈwɒts- /

noun Informal.

a thing or object whose name one does not know or cannot recall.

Origin of whatsis

reduction of what's this
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019