Open Up ( poker )

1) Play liberally or loosely, after having played conservatively for awhile.
2) Go on tilt (Playing poorly and irrationally due to emotional upset, often caused by the player in question having had a good hand beat by a freak draw from another player (often in complete disregard of the odds and good play) or the player having lost a pot because of his own bad play. Also called steaming, having one's nose open, opened up, unglued and being wide open).