a warning about sth 提醒；警告◆Thanks for the heads-up about business etiquette! 感谢你关於商业礼仪的提醒！
a short report giving the most recent information, especially about what is going to happen 简报◆Let me give you a quick heads-up on the new design. 有关这项新设计，让我很快地给你简单说明一下。