You can't focus on studying if you're chatting with someone else, too. So the cell phone is off limits. Turn off the home phone, too, along with the computer (unless you're prepping on it) and any music with vocals. Study music should be lyric-free! Post a sign on your door for people to stay away.
cuirass (plural cuirasses) 1  A piece of defensive armor, covering the body from the neck to the girdle. 2  The breastplate taken by itself.
A piece of defensive armor, covering the body from the neck to the girdle. 1786, Francis Grose, A Treatise on Ancient Armour and Weapons, page 19: The cuirass covered the body before and behind, it consisted of two parts, a breast and back piece of iron, fastened together by means of straps and buckles, or other contrivances.