Classless (adj.) — term used by fans of losing football team to describe any actions by winning team, coach, fans, or cotton-candy vendors that convey happiness at the outcome of a game.
https://grantland.com/features/holly-anderson-college-football-grantland-dictionary/
Sherman didn't swear, didn't say anything politically incorrect, didn't say anything insulting.
It was good fun and the best guy won and got the last word in. Good for him.
The SB will be a great game. The #1 offense vs the #1 defense. The team with the best record in the NFL will win the SB. It's too bad the game will be in NJ in cold weather and that will become part of the story (give Seattle an advantage) instead of in SD/Miami/somewhere pleasant, where the two teams could hash it out mano-a-mano. NJ ruins another great American tradition.