Mr. Nice Guy
a typically pleasant, likable person who avoids causing trouble or dissension (sometimes used with Miss, Ms., or Mrs. instead of Mr. when referring to a female).
The Not-So-Nice Evolution Of The Word “Nice”Recently the phrase nice guy has been used to describe guys who are anything but nice by current standards. But, where did it come from?
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019