まゆつばもの
dubious tale; cock-and-bull story; questionable information
Also written 眉唾もの、眉つばもの
Noun
さっきのトムの話はなしはちょっと眉唾まゆつばものだと思おもう。
I think that we should take what Tom said earlier with a grain of salt.
彼かれのあの話はなしはまゆつばものだ。
That story of his sounds very unlikely.