Jimmy Butler looked like he was about to ask if "people ever heard of closing the goddamn door" at Miami Heat media day ... going full emo with a haircut and piercings!!
The NBA superstar was back at it with his preseason antics on Monday ... showing up to the team facility rocking a look that would fit right in at the When We Were Young festival.
Of course, the 34-year-old All-Star has made it his thing to debut a shocking appearance for his official team photos prior to the season -- last year, he wore dreads for the occasion.