Although 呃詐 is not a valid term, it is possible that people sometimes improvise a term (composed of two syllables with similar meaning) in a hasty manner.
The term you’ve heard could also be 訛詐 [ngo5 zaa3] which means blackmail, swindle or cheat. But this term is used only in literary context.
The term you’ve heard could also be 訛詐 [ngo5 zaa3] which means blackmail, swindle or cheat. But this term is used only in literary context.