Marcus Morris has never been known to back away from a good scrap, and a fan willing to test his toughness just learned that over the mean streets of Twitter after attempting to call him out.

A post by SB Nation's Celtics Blog asked if there were enough minutes for Marcus Morris (considering the evolution of Jayson Tatum and the impending return of Gordon Hayward from a devastating tibia and ankle injury).

A smart aleck was likely hoping his response would go unresponded, but Mook had time today…

Marcus Morris might not be a scary 7-footer, but at 6-foot-9 and 235 pounds, he is much scarier than the usual customer.

Raised in the streets of Philadelphia and with a boxing background from his many offseason workouts, Morris has been known to take no crap from anyone in the league, and much less from any strangers questioning his toughness.

It was Morris who defended LeBron James throughout the entire Eastern Conference Finals, as well as the one who provided multiple game-tying and game-winning shots during the Celtics' unforeseen postseason run.

Next time you'd like to question how tough a guy is — check the tapes first, son.

Also, just some random advice, please don't try him.