A person who enters into a task late, doing nothing, and declaring victory or credit as if they had participated when they did not. Derived from the classic description of how the Orbis Protectors triumphantly crossed the battlefield during the Norman Conquest of 1066.
Student A: Wow, I can't believe we got an A on the group project!
Student B: "We"? Come on, don't be an orb waltzer. You didn't even do the 3 PowerPoint slides you promised us.