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1. an arm and a leg, a great deal of money: to cost an arm and a leg. 2. arm in arm, with arms linked together or intertwined: They walked along arm in arm. 3. at arm's length, on terms lacking in intimacy; at a distance: to keep business associates at arm's length. 4. in the arms of Morpheus, asleep.5. put the arm on, Slang. a. to solicit or borrow money from.. arm in arm, with arms linked together or intertwined: They walked along arm in arm. 3. at arm's length, on terms lacking in intimacy; at a distance: to keep business associates at arm's length. 4. in the arms of Morpheus, asleep. 5. put the arm on, Slang.
Posterior shoulder stretch. Extend your injured arm in front of you to shoulder level and take hold of your elbow with your other hand. Draw your elbow in towards you until you feel a stretch at the back of your shoulder (figure 3). Do this for 20 to 30 seconds, followed by a 10 to 20 second rest. Repeat three times.