A rule in many casinos that prohibits a player from showing his mucked hand to only one or some players at the table. Any player may invoke the rule when this occurs, and the dealer
will then show the cards to the entire table. This rule helps prevent collusion
or a player "favoring" one other player with information that the rest of the table isn't privy to.
Example: Villain, before folding on the river, shows his top pair, top kicker to his neighbor. Any player at the table can request "show one show all" and then the hand will be shown to everyone.
Created by LawDude
on 5 Aug, 2009