cement arm

plural cement arms

1. slangA person's arm that has scarred and hardened from the repeated injection of recreational drugs.

   […] this use of codeine causing, in underworld parlance, a “cement arm”, hard lumps forming at the point of injection.

   1932, Traffic in Opium and Other Dangerous Drugs, page 8

   1 more example

   As the “cement arms” became more common, the earlier patients began to fall away. Some of them thought that the iron in the mixture was responsible, and asked Dr. Lilliendahl to leave it out of their prescriptions. But he never did.

   1953, Leroy Street (pseudonym), I was a Drug Addict (page 153)