In the video gameThe Witcher 2, you will often hear enemy soldiers shout that sentence. Lilies are the emblem of the kingdom of Temeria. In essence "Plough the lilies" means "Fuck the Temerians"
A common misspelling of the word "plague" usually used by people who are either too ignorant to know the difference or by people who became too eager to type the letter "u" that they accidentallymisspelled plague.
He was overly stimulated by the thought of typing the letter 'u' that he wrote plauge instead of plague.
A meal often eaten by grafters. The meal often includes cheese, crackers, pickled onions, branston pickle, apples, salad, grated carrot and egg.
To find out about grafters search for them.