Rat Tactics is a type of tactic used in many games and sports, its an unsportsmenship tactic that is often frowned apon by the opposition and/or spectators.
The art of a rat tactic is to utilise a rule or maneuver in such away gives the apponent a disadvantage. Some people would consider rat tactics as cheating but infact it 99% of the time it isnt!
Any Dirty/Unfair/Unsportsman like tactic can be considerd a "Rat Tactic". Not to be Confused with Drain Tactics
which is an illegal tactic.
A Few Examples of Rat Tatics:
In A Sports match deliberatly injuring the oppositions best players.
In a fight, hitting below the belt or eye gouching
In a Written Test Discreetly Asking Other people for anwers
In A Game of snooker, diberatly hitting the apponents ball away from the pocket.