Calm Skill (3.5e Feat)
From D&D Wiki
 Calm Skill [General]
You have used this skill so many times that it is second nature to you.
Prerequisite: Skill Focus in selected skill, 12 ranks in selected skill.
Benefit: Select a skill. You can always can choose to take 10 on a skill check with the selected skill, even if distracted or endangered. You also gain an additional +2 bonus on checks with the selected skill.
Special: You can gain this feat multiple times. Each time you take the feat, it applies to a new skill.