In Your Face! (Fallout Supplement)
From D&D Wiki
IN YOUR FACE!
You can easily distract your enemies.
Prerequisite: BAB 3, Dodge
Benefit: Opponents can't make called shots and suffer a -2 penalty to hit with ranged attacks when you are adjacent, and are only holding melee weapons or are unarmed.
Normal: You get no special bonuses when adjacent to a target in melee.