Douglas Harper's Etymology Dictionary
W.C.
"lavatory," by 1871, abbreviation of water-closet.
Wikipedia
W.C. (film)
W.C. is an independent Irish Film, about two toilet attendants. The film premiered at the 2007 Dublin Film Festival and has screened at numerous other international film festivals worldwide, it won the best foreign film award at the 2009 Las Vegas film festival and best film at the Waterford film festival. The film was released theatrically in 2009.