在“大师”辈出的年代，人们应善于辨别，分清真假。

Local authorities have kicked off an investigation into a phony “qigong master” who had duped many people.
一个冒牌的“气功大师”欺骗了许多人。地方当局已经开始对其进行调查。

“Master liars” is the better name for phony masters.
“谎言大师”才是更适用于冒牌大师的称号。

除了phony，还有fake和bogus等词来表示“冒牌”一词，例如“冒牌（假）警察”可以说成phony / fake policeman。