Nuzza is a character that is famous for its dirtiness, nastiness, and its love for flat chest. Since the Nuzza is very easy to draw and usually hated by people, many people willingly draws the 'Nuzza' as a result of boredom.
Drawing Nuzza could also indicate that the artist is being lazy and does not want to draw anything high quality
Although many high quality Nuzza-s were drawn, it is common for people to react to it by saying 'dirty', 'Nasty' or 'Huh... it's just Nuzza'