South Sydney back rower Glenn Stewart admits he took a dive to deny North Queensland a try during the Rabbitohs' 30-12 loss at the Olympic stadium on Monday evening.

Stewart fell after colliding with Cowboys forward Ethan Lowe as Michael Morgan scooted over for a try on the stroke of half-time.

Referee Adam Devcich referred the decision to the video referees who came back with a no-try verdict.

Cowboys captain Johnathan Thurston expressed his extreme frustration towards the referee over the decision.

Devcich said to Thurston both he and the video referees felt Stewart was unfairly obstructed by Lowe.

But on Tuesday at a Rabbitohs' recovery session, Stewart says he took a dive to draw the obstruction ruling, describing the move as "gamesmanship".

"To be honest I wasn't going to get there (to tackle Morgan) so I tried something and it came off," he said.

"Everyone wants to win. I wasn't going to get to the bloke so I had a crack and fortunately it went our way.

"In a game you do everything you can to win and I just had a crack."

Steward made no apologies for his actions.

"You have seen other people try and do it," he said.

"It's within the rules and while a lot of people out there (on social media) are probably giving it to me, we are out there trying to win.

"If we had won by two or four points I probably would be copping it a lot more, but we would still have the two (competition) points.

"I was pretty surprised to be honest.

"It is gamesmanship, a fair bit goes on week to week and, if I cop it about it, I cop it about it."

AAP