Grafting Share definition Flag Scottish slang meaning a guy who is trying to get a girl to like him. A bit like flirting. Can be shortened to 'graft' or 'g-rafting' "Oh see Dave over there he's grafting on Lisa""Dave's on the graft""Dave's g-rafting""Graft graft graft your boat gently down the stream..." Grafting by omacc October 10, 2014 Get the Grafting mug.