scuminessum Share definition Flag adjective. describes a person or thing of how bullshiting it is, or how non-important it really is. pointless, useless. "that guy over there is so scuminessum. he aint do shit in class but sleep." scuminessum by Lunarclipse06 February 27, 2009 0 0 Get merch Get the scuminessum mug. Buy Now — $32.95 See more merch