Pradal Serey () or Kun Khmer () is an unarmed martial art and combat sport from Cambodia. It is a sport martial art practiced by young athletic people. The official Khmer name of the sport is Kbach Kun Pradal Khmer. In Khmer, "pradal" means fighting or boxing and "serey" means free. Thus, "pradal serey" may be translated as "free fighting" or "free boxing". The sport consists of stand up striking and clinch fighting where the objective is to knock an opponent out, force a technical knockout, or win a match by points.