Mark Cuban ain't losing sleep over the controversy in the NBA over the term "owner" -- telling TMZ Sports, "It's not that big a deal."
"If you run a company, own a company, start a company ... you decide [on what to call yourself]," Cuban told us.
Of course, Cuban purchased the Dallas Mavericks back in 2000 and is still listed as "owner" in the team's 2018-19 media guide.
The issue ... several players, including Draymond Green, have voiced concern over the term -- essentially saying it's racially insensitive in a league comprised of mostly black players.