On the rag

prep_phrase, slang

Definitions

Prep_phrase
  1. 1
    Menstruating. derogatory, euphemistic, idiomatic, slang, sometimes, vulgar

    "She herself had begun menstruation shortly after her eleventh birthday and had gone to the head of the stairs to yell down excitedly: "Hey, Mum, I'm on the rag!""

  2. 2
    In a bad mood; angry or irritable. broadly, derogatory, idiomatic, slang, vulgar

    "On the rag, in a bad mood.—College males, Arizona. I had a lousy time last night because she was on the rag."

  3. 3
    Used other than figuratively or idiomatically: see on, the, rag.

Etymology

From rag as a slang term for a menstrual pad. First use appears c. 1967. See cite below.

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