1 definition by Nothing is left but this

This word has no definition in any known language. It is soley used in the english language as a set up for a joke, relating to the common phrase "what's up?" And the referal to a person as "dog".
Person 1: "Ew, it smells like updog in here."
Person 2: "What?"
Person 1: "You know, updog."
Person 2: "What's updog?"
Person 1: "Not much what's up with you"
Person 2: *punches Person 1 for making such a terrible joke*
by Nothing is left but this April 3, 2018