摆不到桌面上

Traditional (Taiwan): 擺不到桌面上

bǎibùdàozhuōmiànshang ㄅㄞˇ ㄅㄨˋ ㄉㄠˋ ㄓㄨㄛ ㄇㄧㄢˋ ˙ㄕㄤ

    • too shameful to make public
    • unfit for formal occasions

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
can't be put on the table
Meaning
Either something shameful that can't be made public, or a person who is not fit for formal or grand occasions.

Sources