Former Atlanta Falcons coach Arthur Smith had choice words for New Orleans Saints coach Dennis Allen on Sunday after the opposing team ended a blowout victory over the Dirty Birds with a late-game touchdown.

Smith’s criticism arrived after the Saints – who were up 41-17 with 1:10 left – went into victory formation and instead of quarterback Jameis Winston taking a knee, the team handed the ball to Jamaal Williams who ran into the end zone for the score.

Smith – who was fired after the 48-17 loss following three straight losing seasons with Atlanta – got heated toward Allen when the teams took the field for postgame handshakes.

“That’s fucking bullshit,” Smith said.

“I understand that,” Allen replied.

Allen later apologized to Smith and the Falcons after the game.

“That’s not who we are, that’s not how we operate. We should’ve taken a knee,” said Allen, who noted that the players ran the ball “on their own” and Smith “should be” upset by the move.

Winston told reporters that it was a team decision to hand the ball off to Williams, who got his first touchdown of the season on the play.

“I think that when you have the team morale and I asked the guys, I said ‘Guys, what do you want to do?’ We know how much Jamaal means to this team. And I understood from D.A.’s perspective. So I get from that. But D.A. didn’t condone that at all,” Winston said.

Smith, in postgame remarks to reporters prior to his firing, acknowledged that there were “no rules against” the play.

“They kicked our you-know-what in the second half, they made us pay and took advantage of turnovers. That’s their prerogative,” he said.

“It’s also my prerogative to tell him how I feel. If people like that or not, oh well. Like I said, credit to them, I mean they do whatever they want there.”