wigs on the green
A physical fight. This now-outdated phrase was relevant when men wore powdered wigs (which could be pulled off or knocked loose in an altercation). Conversation is very tense whenever Sir George and Lord Philip are together. I anticipate wigs on the green the next time they meet.
wigs on the green
violent or unpleasant developments; ructions. The image here is of wigs becoming dislodged or being pulled off during a brawl.
1996 Frank McCourt Angela's Ashes Mam threatens us from the bed that we're to help our small brother. She says, If ye don't fix yeer brother's shoes an' I have to get out of this bed there will be wigs on the green.