Sap Boy Share definition Flag A sap child, one that is lonely and is lost in life. Always uses fake smiles to cover themselves up. They have no women. They also cry to themselves at night. Collin is acting like a sap boy, let's go talk to him. Sap Boy by Eizekio May 27, 2017 0 0 Get merch Get the Sap Boy mug. Buy Now — $32.95 See more merch