Be somebody’s lookout
verb
To watch for possible danger, problems, or police and warn someone.
While the kids were swimming in the prohibited area, John was their lookout to alert them if any authority showed up.
Often appears as...
- be someone’s lookout
- act as someone's lookout
Usage tips
Idiomatic
verb
To be responsible for dealing with a certain situation or problem.
It’s not my job to keep the kitchen clean, that’s your lookout.
Often appears as...
- be someone’s lookout
- it's your lookout
Usage tips
Colloquial
verb
To watch for possible danger, problems, or police and warn someone.
While the kids were swimming in the prohibited area, John was their lookout to alert them if any authority showed up.
Often appears as...
- be someone’s lookout
- act as someone's lookout
Usage tips
Idiomatic
verb
To be responsible for dealing with a certain situation or problem.
It’s not my job to keep the kitchen clean, that’s your lookout.
Often appears as...
- be someone’s lookout
- it's your lookout
Usage tips
Colloquial
Definition 1 of 2
Pro Tip 1/3Secretive Alertness
This usage often implies a need for secrecy or discretion in watching out for potential threats.
Quiet! I’ll be your lookout for teachers while you finish the mural.
Pro Tip 2/3Unofficial Role
Acting as a lookout is typically an informal, unsanctioned position among peers or groups.
During the party, Mia was our lookout for any unexpected guests.
Pro Tip 3/3Protection
Being someone's lookout is a protective role, aiming to keep others safe from trouble.
He quietly signaled as he was their lookout, and everyone hid away.
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