thick-skinned
adjective
- having a thick outer coat or peel (of plant or fruit)
- not easily offended
- impervious to insult, injury
Wiktionary
adj
- Having a thick skin.
- Not easily offended.
- Insensitive to the feelings of others; callous.
- Obtuse, thick, intellectually dull or insensitive.
“They that are ſo thick skinned as ſtill to credit the ſtory of the Phœnix, may ſay ſomething for animall burning: […]”