石点头

Traditional (Taiwan): 石點頭

shídiǎntóu ㄕˊ ㄉㄧㄢˇ ㄊㄡˊ

    • to be utterly convincing
    • to accept an argument reluctantly

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
stones nod
Meaning
Said of something so persuasive that even stones nod; also of reluctantly accepting a convincing argument. Comes from a Buddhist legend.

Sources