I asked a past master.
He is a past master at bridge.
She's a past master at getting what she wants.
She is an adept rock-climber and a past master of the obstacle course.
Melies was a past master of illusion long before the invention of the motion picture camera.
He was a past master at manipulating the media for his own ends.
After working in the factory for 35 years, this veteran worker is a past master in his line.
Mr Saleh, a past master at balancing the tribes and dispensing patronage, seems determined not to be hustled out of office after nearly 33 years.
