17.5 Share definition Flag The amount of money that a kilo (or 36 ounces, i.e. a bird) of cocaine sells for (17.5k or $17,500). phrase made popular by Young Jeezy. I got that bird for 17.5 17.5 by gnirts May 29, 2007 0 0 Get merch Get the 17.5 mug. Buy Now — $32.95 See more merch