I've got your number
表示看穿某人的意图或本质，不会被欺骗。
用于警告或揭露他人，语气直接。
英文释义
To say you can't be fooled by someone since you have them figured out
例句
Stop lying—I've got your number, and I know what you're up to.
典故来源
源自20世纪初俚语，'number' 指人的特点或底细，比喻识破伪装。