2005mar14. Digging through ask.metafilter some more. Found in the middle of suggestions for someone who has an aggressive roommate who cannot control his own anger:
When my dad was in grad school he and his housemates came up with a house rule for stopping arguments. Any time it looked like someone was getting angry, anyone could yell “Suit up!” Then everyone in the room would have to form ”hand glasses” – making a circle with your index and thumb, turning your hands upside down and then hooking your middle, ring, and pinky fingers along the sides of your face so your palms pressed against your cheeks and the index and thumb formed “glasses” around your eyes. The idea was that no one could possibly continue a serious argument while looking so ridiculous.