whoosis

Also whoo·sy
Or who·sis

[hoo-zis]

noun

Informal.

plural

whoosises 

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