i Register
In some senses, double-u is marked as euphemistic. Watch for register when choosing this word.
noun
The name of the Latin script letter W/w.
Alternative name of the Latin-script digraph ⟨UU⟩.
The WC; the toilet.
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.
noun
Alternative letter-case form of double-u.