"second degree" refers to the level or intensity of something, usually a crime or a burn. It means the situation is less severe compared to the highest level, but still significant or serious. Full definition
The largest one somehow exploded while it was still intimately acquainted with his brown eye, resulting in second degree burns on his ass cheeks and butt hole. (mommyish.com)
Eventually the real killer was convicted on two counts of second degree murder. (lawyer-monthly.com)
A TV show reported a case where a man killed two teenagers and was convicted of both two counts of first degree murder and two counts of second degree murder. (law.stackexchange.com)