that/(one's) time of the month(redirected from Time of the Month)
Also found in: Acronyms.
that/(one's) time of the month
The time, usually once a month, at which a woman begins to menstruate. I've had horrible cramps and have been really tired lately. It must be coming up on that time of the month again. A: "I made a joke about it being Sally's time of the month, and she punched me in the face!" B: "Good for her. You had it coming."