n.
 dated or 
humorous a man who behaves dishonourably, especially towards a woman.
 
  Derivative
  
    - caddish adj.
  - caddishly adv.
  - caddishness n.
 
   
  Etymology
  C18 (denoting a passenger picked up by the driver of a horse-drawn coach for personal profit): abbrev. of caddie or cadet.