I know both words but am not familiar with the combi. What's a cum tribute? You cum on something/someone you want to pay tribute to? An unknown kind of car?
It's basically when dudes cum on printed pictures of women they find attractive, then take a picture of the picture with cum on it. The internet is a very strange place indeed.
I wanted to do a cum tribute but by the time the printer finished printing that photo of Christina Ricci sitting naked on the bed, my boner was gone.