Persy

{v} The act of mistaking what cards you have in your hand during a texas hold 'em game of poker, going all-in, and losing after realizing the cards you have aren't the cards you thought you had.

Mat thinking: "Man I've got a sweet hand!"
Mat speaking: "All-in. AH SHIT! I thought I had a king!!"
Fowler: "Haha stupid Persy, he has a small wiener!"