Wiktionary
chancre mechanic
n. (cx US military slang English) A medic.
Usage examples of "chancre mechanic".
McCracken, Medical Corps, USNR, was wearing, proudly, dyed-black trousers and an unbuttoned Marine Corps dungaree jacket-as if to leave no question that he had been the doc of Baker Company, survivor of the Makin Raid, as opposed to your typical natty, run-of-the-mill chancre mechanic.