Definition of "double-u"

double-u

/ˈdʌbəljuː/

noun
plural double-ues
1. The name of the Latin-script letter W.
2. Alternative name of the Latin-script digraph *UU*.
3. (euphemistic) The WC; the toilet.
  Quotations
  She would try the front door, and try the back door, and look in the windows; and once she even looked in the double-u.
  1974, GB Edwards, The Book of Ebenezer Le Page, New York, published 2007, page 234