A "prat" is convinced he has better hearing and a far more resolving system than others. The normal "prat" behaviour is to "slam" inferiors with little explanation or constructive advice other than anecodotes. If you don't get it then you are either deaf or don't have a "resolving system". Typical manifestation is a preference for extremely expensiove boutique brands, totally inexplicable phenomena and a snobbish condescending attitude to any conventional consumer gear as being woefully inadequate. If a component is cheap then it can't possibly be any good.
Occasionally "prats" will band together unanimously and bash a successful consumer audio company like Bose - this is called a "Grand Slam".
Most audiophiles are real "prats", and of course I include myself among this esteemed group!!! ;-)