You can flag down a taxi on this busy street.
flag down
idiomUse a flag or similar kind of signal to get someone's attention.
When the bus did not stop at the station, I had to run into the road to flag down a passing driver.
Desperate to reach the hospital before the storm worsened, the traveler stood by the roadside and frantically attempted to flag down any vehicle heading toward the city.
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fly the flag
To support one's country enthusiastically.
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freak flag
Unconventional or unrestrained behavior; extreme, nonconformist views; the side of one's personality which harbors a tendency toward such behavior or such views.
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Hoover flag
An empty (penniless) pocket, turned inside out, showing that someone has no money (especially during the Great Depression.)
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raise the flag and see who salutes
To float an idea, (or otherwise do some action) to see what response or controversy (if any) it generates, usually as a preliminary step.
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rally round the flag
To unite in order to support one's country, especially during a crisis or war.
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red flag
Something that will enrage a particular person; a red rag.
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show the flag
Of a naval vessel or military force, to identify itself by displaying the flag of its country of origin, especially in order to establish an authoritative presence and to exert diplomatic or political influence.
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strike one's flag
To yield, give up, or surrender.