adj; To do a disappearing act. Going AWOL/MIA from work in particular leaving your colleagues to pick up the pieces.
Bob: "Morning Trace, nice to see you"
Tracey: "Alright Bob, 'ave a nice holiday. You looked very tanned!"
Bob: "It was lovely Trace.......where's Peter?"
Tracey: "He's got his invisibility cloak on Bob..*sarcastic smile*... He's been doing a Potter since last Wednesday. Not even called in you know?! The cheek..."