noun
kleptocrat; corrupt politician
A derogatory term for a politician who uses their position for personal gain, especially through theft or embezzlement. Strongly negative and colloquial.
あの泥棒政治家は公金を横領した。
That kleptocrat embezzled public funds.
選挙で泥棒政治家を落とそう。
Let's vote out the corrupt politicians.
汚職政治家 is a more formal term for a corrupt politician, while 泥棒政治家 is a harsher, more colloquial insult.
Compound of 泥棒 (thief) and 政治家 (politician). The term is a straightforward pejorative likening a corrupt politician to a common thief.