69 Share definition Flag 69 is slang for when two partners arrange their bodies to perform oral sex on one another at the same time in a way said to look like the number 69. "Hey how much money do you have?" "69 cents." "Heh. You know what that means..." "Heheh..." 69 by TheGamer2000 May 16, 2020 0 0 Get merch Get the 69 mug. Buy Now — $32.95 See more merch