Smilkshake Share definition Flag A blended mixture of smegma and milk. Similar to the consistency of a milkshake (hench the name). In the fraternity's new hazing tradition, recruits were forced to drink smilkshakes from the vaginas of nasty old women. Smilkshake by matt e. m. August 28, 2005 0 0 Get merch Get the Smilkshake mug. Buy Now — $32.95 See more merch