boo to j00 Share definition Flag A derogatory term used by the l33t in order to discreetly insult noobs without their knowledge. See suxxor. You cannot own my 133t skillz. Boo to j00! boo to j00 by Fooby February 20, 2004 0 0 Get merch Get the boo to j00 mug. Buy Now — $32.95 See more merch