The idiom "heads up" is used to alert someone to pay attention or be aware of something that is about to happen. It is often used as a warning to prevent someone from getting hurt or to avoid a potential problem.
For example, if you see a ball flying towards someone's head, you might shout "heads up!" to warn them to move out of the way. Or if you are walking on a busy street and see a car coming towards you, you might say "heads up!" to alert your friend to be careful.
The phrase "heads up" can also be used to give someone a heads-up, which means to give them advance notice or information about something. For example, if you know that your boss is going to ask for a report at the meeting, you might give your colleague a heads-up so they can be prepared.
In summary, "heads up" is a slang term used to warn someone to be careful or to give them advance notice about something. It is a useful phrase to know and can be used in a variety of situations.
• Heads up! The stock market is experiencing a drop, so it might be wise to hold off on investing for now.
• Heads up! You might want to double-check your flight details before leaving for the airport.
• Heads up! I heard there is going to be a major traffic jam on the highway.
• Heads up! The meeting with the boss has been rescheduled to tomorrow.
• Heads up! The government has issued a warning about potential cyber attacks, so make sure to update your security measures.
• Heads up! There's a ball coming towards you!