D-millions Share definition Flag Expression for big tits; often used when talk about a girl with big tits. Comes from the bra size of Double D. 1. Look at them D-millions! 2. I'd fondle those D-millions any day of the week! D-millions by kabobles November 28, 2011 0 0 Get merch Get the D-millions mug. Buy Now — $32.95 See more merch