A poker technique commonly employed by poker players at Casinos in Biloxi, Philadelphia, and New Orleans. In order for a bluff to be considered a Mississippi River bluff, the following criterion must be satisfied:
1) The player is playing Texas Hold 'Em or a similar game,
2) the player open shoves fifth street, and
3) the player is playing the board.
I can't believe that fish called my Mississippi River bluff with only top pair!