18 money Share definition Flag “18 Money” is the money a Native American receive once they turn 18. NA 1: hey man, you wanna go on a trip? NA 2: yeah sure, I’m just waiting till I get my 18 money. 18 money by Eric•~• June 27, 2020 0 0 Get merch Get the 18 money mug. Buy Now — $32.95 See more merch