usually a person, like the man rahatman himself from chesney universe. The person usually portrays himself to be an ultimate extreme person, i.e great sportsman, intelligence, social king, legend, ruler of shafiq khans and in general better than everyone else at everything. you are also stingy.
if you are a rahat man then you would have bowled against brian lara, hit sixes off kurley ambrose and shoaib akhtar. you would have also played county cricket at youth level, and semi-pro football.
my mate pulled a kaseem on me