yeanknow Share definition Flag A contraction for "You don't know." As heard in the song "Baby Mama" by Three 6 Mafia: But chu betta take care yo' kids Juvenile Court is where it's at Where it's at? Yeanknow? Cheese is missin' yean show yeanknow by Txrngr October 15, 2006 0 0 Get merch Get the yeanknow mug. Buy Now — $32.95 See more merch