名詞 heads up:

1. a warning message
   同義詞：heads-up

動詞 head up:

1. be the first or leading member of (a group) and excel
   同義詞：head, head up

形容詞 heads up:

1. fully alert and watchful
   同義詞：heads-up, wide-awake

1. One of my jobs at the newspaper office was to head up the page before it was printed.
   我在報社有一項工作是報紙付印前給版面上加標題。
2. "Heads up!" said the waiter carrying the hot food.
   "當心！"端著熱食物的男招待說。