Bold; thick-skinned; shameless — describing someone who is brazen, not easily embarrassed or intimidated.
彼は図太いので、誰に何と言われても気にしない。
He's thick-skinned, so he doesn't care what anyone says.
図太い態度で謝ろうとしないのは困る。
It's a problem that he won't apologize and acts shamelessly.
あの子は図太く育ったから、大勢の前でも緊張しない。
That child grew up bold, so she doesn't get nervous in front of a crowd.
図太さが必要な場面もあるが、礼儀は忘れてはいけない。
There are situations that require thick-skinnedness, but you mustn't forget manners.