keep (one's) head below the parapet

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keep (one's) head below the parapet

To hide or remain inconspicuous in an attempt to avoid trouble or danger. I wouldn't say anything right now—just keep your head below the parapet for the time being.
See also: below, head, keep, parapet
References in periodicals archive ?
In today's environment some might say that there are often more reasons to keep your head below the parapet than above it.
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