You can attempt to hinder a foe in melee as a standard action. This maneuver covers any sort of situational attack that imposes a penalty on a foe for a short period of time.
Examples include kicking sand into an opponent’s face to blind him for 1 round, pulling down an enemy’s pants to halve his speed, or hitting a foe in a sensitive spot to make him sickened for a round.
The GM is the arbiter of what can be accomplished with this maneuver, but it cannot be used to impose a permanent penalty, and the results can be undone if the target spends a move action.
If you do not have the Improved Dirty Trick feat or a similar ability, attempting a dirty trick provokes an attack of opportunity from the target of your maneuver.
This condition lasts for 1 round. For every 5 by which your attack exceeds your opponent’s CMD, the penalty lasts 1 additional round. This penalty can usually be removed if the target spends a move action.
If you possess the Greater Dirty Trick feat, the penalty lasts for 1d4 rounds, plus 1 round for every 5 by which your attack exceeds your opponent’s CMD. In addition, removing the condition requires the target to spend a standard action.