Use heads up in friendly spoken or informal written communication before giving a warning, reminder, or early notice. As a noun before another noun, the hyphenated form heads-up is often used, as in heads-up email.
Use heads up in friendly spoken or informal written communication before giving a warning, reminder, or early notice. As a noun before another noun, the hyphenated form heads-up is often used, as in heads-up email.
| Incorrect | Correct |
| Thanks for the head up. | Thanks for the heads up. |
| This is a heads up email. | This is a heads-up email. |
| Heads up about it yesterday. | I gave you a heads up about it yesterday. |
| Heads up, the meeting started yesterday. | Heads up, the meeting starts in ten minutes. |
Use heads up as a short spoken command when quick attention matters, especially in sports, classrooms, workplaces, or safety situations. For one person, head up can describe the physical action, but heads up is the set warning phrase.
| Incorrect | Correct |
| He walked heads up all day. | He walked with his head up all day. |
| Heads up your face. | Lift your head up. |
| The coach said head ups. | The coach said heads up. |
| Heads up, I am looking at the floor. | Heads up, look at the ball. |
Use it for quick, friendly alerts and informal notices. In formal writing, choose warning, notice, advance notice, or alert unless the conversational tone is intentional.
Thanks for the head up is a common error. The idiomatic warning phrase is heads up, and the adjective before a noun is often hyphenated as heads-up.
The phrase comes from the literal instruction to keep the head up and stay alert. From that physical warning, it developed into the noun-like use a heads up, meaning advance notice or an alert before something happens.
What does heads up mean?
It means a warning, alert, or advance notice. It can also mean look up and pay attention.
Is it head up or heads up?
The idiomatic warning phrase is heads up. Head up is usually a literal description or command for one head.
What does thanks for the heads up mean?
It means thanks for the warning or advance notice.
Is heads up informal?
Yes. It is common in speech, messages, and workplace chat, but formal writing often uses warning, notice, or alert.
When do you hyphenate heads-up?
Hyphenate it when it works like an adjective before a noun, as in a heads-up email or heads-up warning.
Can heads up be a safety warning?
Yes. Someone may shout heads up to warn that an object is coming or that people should pay attention quickly.
What are synonyms for heads up?
Synonyms include warning, alert, notice, advance notice, tip-off, reminder, and caution.