Slang of the First World War"Duck's Breakfast" Posted on August 31, 2017 by Jordan Slump Today is #NationalEatOutsideDay. Did you know in the First World War, to have a “duck’s breakfast” meant the simple pleasure of a face-wash and drink of water? (Doyle, Walker, Trench Talk – Words of the First World War, p. 144). A Canadian enjoys a “duck’s breakfast” in May 1917. Credit: Canada. Dept. of National Defence/Library and Archives Canada/PA-001193.