Jeezin' it up Share definition Flag most common conjugation of Jeez it up. Means to be doing anything related to jesus, ie; church. yo, I was just over at the church, Jeezin' it up! Jeezin' it up by Eric January 23, 2004 0 0 Get merch Get the Jeezin' it up mug. Buy Now — $32.95 See more merch
