bullet sponge
n.— «…Temporary superhuman strength and imperviousness to pain.…Drugs can turn the drug user into a “bullet sponge”—someone who can literally…» —“Police Gunning To Boost Odds Drug Dealers Better Armed Than Officers” by Robert Hoiles Akron Beacon Journal (Ohio) Mar. 13, 1989. (source: Double-Tongued Dictionary)
Further reading
A physician in Blowing Rock, North Carolina, shares some of the vocabulary of his patients from Appalachia. There, a misery is anything painful, such as a misery in my jaw if they have a painful tooth or a misery in my back if they have lumbar pain...
If you eat ice cream too quickly, the painful result is called an ice-cream headache, a cold headache, or brain freeze. But if you’d feel better using the medical term for it, it’s another mouthful: sphenopalatine ganglioneuralgia. This...