A moon monkey is the nickname for anyone who's surname is Muloolly or Mullooly or any other spelling I can't think of right now. Instead of having to remember what their name is and how to spell it, just call them Moon-Monkey
Girl A: That Nicola Moon-Monkey has had a babyyou know?
Girl B: Oh yes, what has she called it?
Girl A: Maia Pearl Moon-Monkey
Girl B: How nice!
Noun. A man who identifies with the Madchester scene or Northern English Indie music of the 1990s and early 2000s. Typically wears Parker jackets, check shirts, Adidas Samba trainers and sports messy hair brushed forward over the forehead and ears.