expression
false advertising; crying wine and selling vinegar
A yojijukugo meaning to put up a good front while the reality is poor; literally 'sheep's head, dog meat'. Used for deceptive marketing or appearances.
あの店の広告は羊頭狗肉だ。
That store's advertisement is false advertising.
彼の親
His kindness is a deceptive front; he has an ulterior motive.