挂羊头，卖狗肉
Cry up wine and sell vinegar.
eg：He is crying up wine and selling vinegar by saying that his new book is the best on that subject.
同义词：鱼目混珠 Foist something on one
Cry up wine and sell vinegar.
eg：He is crying up wine and selling vinegar by saying that his new book is the best on that subject.
同义词：鱼目混珠 Foist something on one
