Milwaukee Bucks centre Andrew Bogut has apologised for getting "caught up in the heat of the moment" and making an obscene gesture toward the home crowd while leaving the court.

The Australian may face disciplinary action from the NBA for the outburst, which came near the end of Milwaukee's 108-93 loss to Toronto on Monday night.

Bogut, the No. 1 overall pick in the NBA's annual draft in 2005, was ejected after committing a flagrant foul against Toronto's Chris Bosh with 49 seconds remaining.

Milwaukee television station WTMJ showed video footage of Bogut making a gesture toward the grandstands as he left the court.

Bogut did not talk to reporters after the game, but issued a statement apologising to fans for his action early Tuesday afternoon.

"Our fans have been very supportive of me since I came to Milwaukee and they certainly didn't deserve my reaction coming off the court," Bogut said.

"I got caught up in the heat of the moment and let my emotions get the best of me."

Bucks general manager Larry Harris said the incident was "out of character" for Bogut.

"Our organisation does not condone such actions by our players and we apologise for it," Harris said in a statement.

"We have been in communication with the league and they are reviewing the incident."

League officials have not yet disciplined Bogut for his actions, but there is a precedent for punishment.

In January, the league fined Atlanta Hawks forward Josh Smith $US25,000 ($A32,000) for making an obscene gesture to the crowd after being ejected from a game against the Charlotte Bobcats.

Brought to you by AAP © 2024 AAP