电老鼠

Traditional (Taiwan): 電老鼠

diànlǎoshǔ ㄉㄧㄢˋ ㄌㄠˇ ㄕㄨˇ

    • person who steals electricity
    • electricity thief

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
electric rat
Meaning
A person who steals electricity. Derogatory.

Sources