off the wall
言行古怪或离奇古怪
口语·形容古怪或出格
英文释义
strange, unconventional, or bizarre
例句
His ideas are so off the wall that nobody takes him seriously.
典故来源
可能源于体育（如壁球）中球反弹出墙的意外轨迹，引申为不合常规。