Leaving your front door unlocked is an open invitation to thieves.
open invitation
idiomA situation or action that tempts someone to do something which would typically yield an unfavorable or illegal result.
Leaving your expensive laptop unattended in the library is an open invitation for someone to steal it.
By failing to enforce the security protocols, the manager provided an open invitation for employees to ignore the safety regulations entirely.
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keep a weather eye open
to maintain a background awareness of something; to remain alert to changes without it occupying one's full attention.
- 02
keep an eye open
To remain vigilant for someone or something.
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keep one's ears open
to listen for important information.
- 04
keep one's options open
To not commit to a decision, to keep various options available.
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kick at an open door
To carry out a redundant activity.
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leave the door open
To maintain the possibility of something happening in the future.
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open a can of whoop ass
A good-humored threat of physical harm.
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open book
Something whose salient aspects are obvious or easily interpreted.