Dictionaries:

bloody red flag is up, the:

Or: the red flag is up (is on / is out), flying-the-red-flag / the red-baron is flying the rag , to be menstruating. See menstruation for synonyms.
See Also: baker flying, bloody flag is up, the, bloody red flag is up, the, flying the red flag, menstruation, red flag, the, up and down

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