Wield Oversized Weapon( Complete Warrior, p. 153)
You can use larger than normal weapons with ease.
Monkey Grip (CW) , STR 25, Base attack bonus +21,
You can treat any weapon as if it were one size category smaller than normal and one category "lighter" for the purpose of determining the amount of effort it takes to wield. For instance, a halfl ing with this feat could wield a Medium short sword as a Small light weapon, or a human could wield an ogre's Large greatclub as a Medium twohanded weapon. The weapon still deals its normal amount of damage.
You may only wield weapons of your size without penalty.