Ringworm Sisters Share definition Flag A derogatory term for women of less than desirable sexual cleanliness. Used by groups of broskis - "Dude, ringworm sisters at 9 o'clock" Ringworm Sisters by Marty McBroseph June 29, 2011 0 0 Get merch Get the Ringworm Sisters mug. Buy Now — $32.95 See more merch