camp arm
n.— «The other is the fourth-string Preston Parsons, a “camp arm” in NFL parlance, who is needed to help execute the voluminous passes and handoffs required during the summer but who has little chance of making the team.» —by Stefan Fatsis A Few Seconds of Panic , 2008. (source: Double-Tongued Dictionary)
Further reading
Debbie from Memphis, Tennessee, grew up in Arkansas, where she learned the term trade-last, which refers to “a quoted compliment offered in return for the recipient first offering one to the speaker.” Although those from the American South may...
Does the expression to harp on, as in “to nag,” have anything to do with the stringed instrument one plays by plucking? Yes! As early as the 16th century to harp all of one string meant to keep playing the same single note monotonously. This is part...