To his sister, who was chasing him around the living room, flapping a large pair of pastel butterfly wings (left over from her Halloween costume) in his face:
"Sod off, Clara."
Me: "Winton, did you just tell your sister to 'Sod off'?"
Winton: "Yes, Mummy."
Me [chastened, for this implies more dire things about my vocabulary at home]: