A Texas Hold'em term used by several WSOP players to denote an incomplete 4 card straight. It originated from Mohamad Saleh, a poker physicist, who thought he had a straight at the final table at the Rubin invitational in 2011.
*The River Card shows*
Player 1: I just caught a straight. *Bets*
Player 2: I call.
*Player 1 flips his cards and reveals the Mohamad straight*
Dealer: Sir, that's not a straight.
*Player 1 looks at his cards and the board*
Player 1: Fuck