Could Be Curtains Share definition Flag A phrase meaning that something could be over, as in when curtains fall at the end of a show Jonny-"The Phillies are down 10-0 in the 9th inning."A.J.-"Could be curtains for the Phillies!" Could Be Curtains by AJtheIceman October 8, 2011 0 0 Get merch Get the Could Be Curtains mug. Buy Now — $32.95 See more merch