You have studied Grog's Hack and Smash style of bashing your opponents with giant swords and other big weapons. Such as a great axe. You have learned to keep your balance while you try to batter your opponent into little pieces of flesh.
Power Attack, Acrobatics rank 1, Weapon Focus (Greatsword), Base Attack Bonus +3
You can keep your balance while you swing your big @$$ sword at your opponent. And you can do it so well, that your friends won't jeer and sneer at you while you do swing your big @$$ sword. Mechanically this translates into a reduced penalty of your combat manuever check with a Greatsword and still increase your bonus by 50%. But you still suffer a -1 to your melee attack rolls.
You can choose to take a –1 penalty on all melee attack rolls and combat maneuver checks to gain a +2 bonus on all melee damage rolls.