You aint know! Share definition Flag You already know. As in a confirmation of the previous statement. Kind of a double meaning with "You didn't know" Cecy: You love me? Mane: You aint know! Cecy: Already Mane: Fo Sho. Always. You aint know! by Cecilia Zuniga October 18, 2007 0 0 Get merch Get the You aint know! mug. Buy Now — $32.95 See more merch