Period ache Share definition Flag When your on your menstrual and you have a stomach ache you are having a Pache (P(ache) or a period ache. Definition: Oh my stomach hurts sooo bad I’m having a period ache Period ache by Wordsyoudidntknoeof9383 March 28, 2021 0 0 Get merch Get the Period ache mug. Buy Now — $32.95 See more merch