Acrobatic Dodge (3.5e Feat)
From D&D Wiki
Acrobatic Dodge [General, Fighter]
You have gained prowess in tumbling and can now use your tumbling skill to avoid attacks.
Benefit: When you would normally be hit with a melee or ranged attack roll, you may make a Tumble check to avoid being hit. The DC for this check is equal to the attack roll that would hit you. You gain a free 5‑foot step as part of this Tumble check, which does not use the 5-foot step on your turn, and must take it. (If you cannot take your 5‑foot step, you cannot use this feat. The movement doesn’t count against any other movement you are taking, and does not provoke an attack of opportunity.) You may only use this feat when you have an armor check penalty of 0, are carrying no more than a light load, and are not wielding a two‑handed weapon or shield.
Normal: You may take a tumble check to avoid an attack.
Special: If you have the Dancing Dodge feat you may also make a Perform (Dance) check and add 1/2 the result to the result of the Tumble check.