Rob Whitby Share definition Flag A Rob Whitby (noun) is a term used to describe a highly homosexual being, whom cannot resist temptations of secreting saliva upon other lad's faces. "Yooo man a Rob Whitby came up to me and starting licking my face it was creeeeppyy" Rob Whitby by ChedBomb420 February 9, 2018 Get the Rob Whitby mug.