井底蛙

jǐngdǐwā ㄐㄧㄥˇ ㄉㄧˇ ㄨㄚ

    • person with a narrow world and little knowledge
    • frog in a well

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
frog at the bottom of a well
Meaning
A person with a narrow world and little knowledge. Mildly insulting, close to 'a frog in a well'.

Sources