on thin ice
处于危险或不稳定的境地
口语·警告危险处境
英文释义
being in a risky or precarious situation where one's actions or decisions could have negative consequences or lead to trouble
例句
You're on thin ice if you keep arriving late to work.
典故来源
源自冬季冰面行走的危险，薄冰易碎，比喻处境危险或行为可能引发严重后果。