hot-button issue 极其重要的事（非正式）

英文释义

(INFORMAL) An extremely important concern or argument.

例句
My brother loves soccer and has strong opinions about teams and players, so next year's World Cup is really a hot-button issue for him.
我兄弟喜欢足球，对球队和球员有非常专业的看法，所以明年的世界杯对他来说是非常重要的事情。