whoosis

or who·sis

[ hoo-zis ]

noun

, Informal.

, plural whoo·sis·es.

1. an object or person whose name is not known or cannot be recalled:

   It's the whoosis next to the volume control.

2. a person or thing considered typical or illustrative:

   the usual paragraph about the party given by Mme. Whoosis.

Word History and Origins

Origin of whoosis¹

First recorded in 1920–25; alteration of phrase who's this