PWM : An acronym for "Players With Money". In business (especially sales) you don't want to deal with suspects or prospects. You should seek to only deal with legitimate "players with money"-- decision makers who can afford your product or service. As they will happily pay full price and won't constantly haggle with you seeking discounts or deals.
The opposite of a PWM are tire kickers and pikers.
The sales rep missed hitting his quota this month because he wasted his time dealing with a bunch of suspects none of whom were actual PWMs.