be aware.

They say a storm is coming, so watch out and don't take any chances.

Usage notes: sometimes used as an order:

Andy saw the car coming toward them, and yelled, “Watch out!”

Related vocabulary: look out

• not for the life of me
• not give a damn
• not give a damn about
• not give a damn about someone
• not give a damn about something
• not give a fig
• not give a hoot
• not give a monkey's
• not give an inch
• not give a rat's ass
• not give a second thought
• not give a shit
• not give a shit about
• not give a shit about someone
• not give a shit about something
• not give a tinker's cuss
• not give a toss
• not give someone house room
• not give someone the time of day
• not give something a second thought
• not give something house room
• not give the time of day
• not give tuppence
• not go a bundle on
• not go a bundle on something