Found 2 items, similar to heads-up.
English → English (WordNet) Definition: heads-up heads-up adj : fully alert and watchful; “played heads-up ball” [syn: wide-awake]
English → English (gcide) Definition: heads-up heads-up \heads-up\ adj. maintaining presence of mind; alert and attentive; able to recognize and take quick advantage of opportunities; resourceful; as, he played good heads-up baseball. Syn: wide-awake. [WordNet 1.5] heads-up \heads-up\ n. [From its use as an interjection to warn of impending danger.] a warning to be prepared for an imminent event. [PJC]