As Ginnivan ran into an open goal during the last quarter of Thursday night's AFL game at Marvel Stadium, he showboated by turning and showing the ball to the opposition.
His goal sealed their 22-point win and Ginnivan had a strong game.
But a lot of the talk post-game was about the showboating and Ginnivan was unmoved.
"Why everyone wanna be so serious, bro can't have fun," Ginnivan tweeted, adding a couple of dinosaur emojis to drive home his point.
But teammate Mabio Chol, who starred with four goals, wasn't rapt with Ginnivan's taunting.
"Look, I wasn't a fan of it, to be honest," Chol told Fox Footy.
"It's Ginnivan. What can you do? It's him. It's his personality."
Hawks defender Karl Amon backed Ginnivan, saying his form had been impressive since the forward was dropped earlier this season.
"I'm down the other end, so I don't do that stuff. But it's all part of the package with Jack," Amon told AAP.
"Ever since he's been dropped, he's come back to the AFL with a massive workrate and it's got him involved every week.
"It's a credit to him that he's come back in really good form and worked his spot really well."
Hawks coach Sam Mitchell smiled sheepishly when asked about Ginnivan's gesture and did not want to comment, while Bulldogs counterpart Luke Beveridge was unfussed.
"Sometimes, with the contemporaries these days, it doesn't even go in the memory banks," Beveridge said.
"Next time we play the Hawks they won't even remember it and I won't show it.
"That's what he does, it's the way he rolls."
Hawthorn snapped their three-game losing streak and Mitchell was rapt with how they played.
"If we hadn't won tonight ... I still would have thought of this game as closer to the way we want to play," he said.
"We showed what our best can look like."
Mitchell had NRL coach Todd Payten looking over his shoulder in the coaches' box.
"The boys were making a bit of a joke that I had him just to make sure they tackled well. If not they might get tackled by him," Mitchell said.
Indeed, the Hawks ramped up their tackling and Beveridge admitted it was too much for his team.
"If the opposition coach says we were too physical, that's a pretty good blueprint to win most games," Mitchell said.
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