heads-up
noun [ C usually singular ] informal uk/ˈhedz.ʌp/ us/ˈhedz.ʌp/
小心，注意（用于提醒某事要发生）
a warning that something is going to happen, usually so that you can prepare for it
This note is just to give you a heads-up that Vicky will be arriving next week. 这张便条只是提醒一下你维基下星期要来。
有关形势（或计划）发展状况的讲话（或声明）
a short talk or statement about how a situation or plan is developing
The boss called a meeting to give us a heads-up on the way the project was going. 老板召集会议通报计划进行的情况。