Exotic Weapon Proficiency( Player's Handbook v.3.5, p. 94)
[Fighter Bonus Feat, General]
Choose a type of exotic weapon, such as dire flail or shuriken (see Table 7-5: Weapons, page 116, for a list of exotic weapons). You understand how to use that type of exotic weapon in combat.
Base attack bonus +1,
You make attack rolls with the weapon normally.
You can gain Exotic Weapon Proficiency multiple times. Each time you take the feat, it applies to a new type of exotic weapon. Proficiency with the bastard sword or the dwarven waraxe has an additional prerequisite of Str 13. A fighter may select Exotic Weapon Proficiency as one of his fighter bonus feats (see page 38)
A character who uses a weapon with which he or she is not proficient takes a -4 penalty on attack rolls.