meaning that the dealt hand will be held in entirety and no cards will be discarded on the draw. In some games, such as PKM, it is not possible to have a Pat hand. Supposedly, some machines lock up for a dealt (Pat) Royal Flush so that the player will not be able to make a mistake.
Following a pre-determined strategy perfectly, without mistake or deviation, in any way. In most cases, Perfect Play refers to play following a simplified Max-EV strategy.
