ferts Share definition Flag Fertile. Iphone app says you are fertile. Reason for hotflashes. Moods. Pre-menstrual. "Why am I so PMS-y? I'm not on my period." "Oh girl, you're probably ferts" ferts by mochacoughy February 27, 2012 0 0 Get merch Get the ferts mug. Buy Now — $32.95 See more merch