When you no longer see a person irl but you're still friends on Facebook and might even occasionally interact.
Person 1: "I saw Sarah today, did you go to her babyshower?"
Person 2: "Sarah from high school? No we're Facebook formal, I saw pictures though."
Person 2: "Sarah from high school? No we're Facebook formal, I saw pictures though."
by Pomme de terre December 3, 2020
Get the Facebook formal mug.