铁交椅

tiějiāoyǐ

铁交椅 — tiějiāoyǐ

1. a secure post or position that is very unlikely to be lost; an unbeatable seat

   他坐着公司的总经理这个铁交椅多年，几乎不可能被炒掉。 tā zuò zhe gōngsī de zǒngjīnglǐ zhège tiějiāoyǐ duōnián jīhū bùkě néng bèi chǎo diào — He has occupied the iron chair of company general manager for years and is almost impossible to be fired.