all my eye (and Betty Martin)
Nonsense talk. The origin of this phrase is disputed, but it may have originated with a sailor whose retelling of a beggar's (misheard) words was regarded as nonsense. Oh please, she's not rich. Any talk of wealth is all my eye and Betty Martin. If he says he's good at tennis, it's all my eye—he's terribly uncoordinated on the court.
all my eye (and Betty Martin)
nonsense; not true. Jane is always talking about her wonderful childhood, but it's all my eye. He pretends to have great plans, but they're all my eye and Betty Martin.