third rail
US /ˌθɜːrd ˈreɪl/
UK /ˌθɜːrd ˈreɪl/

1.
뜨거운 감자, 건드려서는 안 될 문제
a political issue that is so controversial that any politician who dares to broach the topic will suffer a backlash from voters
:
•
Healthcare reform has become a third rail issue in American politics.
의료 개혁은 미국 정치에서 뜨거운 감자가 되었다.
•
No politician wants to touch the third rail of social security.
어떤 정치인도 사회 보장의 뜨거운 감자를 건드리고 싶어하지 않는다.