keep a weather eye open

An instruction to monitor someone or something, often because the person or thing in question may turn out to be dangerous. I think Tom's a thief, so keep a weather eye open around him. I'd keep a weather eye open with this storm that's brewing—we may have to evacuate.

Common Names:

Name	Pronounced	Usage
Abu	-	Arabic
Kaia	-	Norwegian, Estonian
Marvel	['ma:vəl]
CÂNdido	-	Portuguese
Herleva	-	Ancient Germanic
Barbie	['ba:bi]