A lavatory: a room containing a toilet and (typically but not necessarily) a bathtub.
A room containing a shower and/or bathtub, and (typically but not necessarily) a toilet.
To assist a patient with using the toilet and general personal hygiene.
A lavatory or outhouse.
A rapper, or a performer of rap music.
A chamber pot or toilet, particularly (dated) a flush toilet by Thomas Crapper.
A half-glass of whiskey.