没脚蟹

Traditional (Taiwan): 沒腳蟹

méijiǎoxiè ㄇㄟˊ ㄐㄧㄠˇ ㄒㄧㄝˋ

    • a person with no one to rely on
    • an isolated, helpless person

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
legless crab
Meaning
A person with no one to rely on, isolated and helpless.

Sources