up to the hilt
完全、彻底地
口语·强调彻底参与或陷入
英文释义
completely or fully involved or committed to something
例句
He's up to the hilt in debt after buying that house.
典故来源
源自剑柄（hilt）插入剑鞘至尽头，比喻完全投入或陷入。