Definition of whosis in English:

whosis

(also whosit)

noun

informal
  • (often in titles) a person whose name one cannot recall, does not know, or does not wish to specify.

    ‘lunch with Senator Whosis who was so fond of bourbon’
    • ‘Listen, Moby, I've still got some campaign money from the American Muslim whosis and the Chinese just sent another briefcase full of…’

Origin

1920s: contraction of who is this?.

Pronunciation

whosis

/ˈho͞ozis/