Intentional Flashing
Intentional flashing is the deliberate showing of one or more hole cards to an opponent or to the whole table. The player does it on purpose, not by accident.
The simple explanation
A player may show a card to the table to make a point, to confuse the opponents or to irritate them. It is called intentional because he means to show it.
A closer look
Players use it as a way to affect the table image, to get a reaction or to give false information. Many rooms discourage showing cards during a hand because it can give an advantage to some players, and a player who shows his cards to one player might be breaking the rule against sharing information. Check the rules of your room before doing it.
A practical example
A player lifts the corner of a card and shows his bluff to the player next to him. The dealer warns him about the rule.
Full explanation
Intentional flashing is the deliberate showing of one or more hole cards to an opponent or to the whole table. The player does it on purpose, not by accident.
Intentional flashing is showing a card on purpose.
It differs from an accidental flash.
Players use it to affect the table image.
Rooms may forbid it during a hand.