Burt Jenner Slams Caitlyn Haters in New Instagram Photo

Burt Jenner gives Caitlyn haters the calling out they deserve.

Caitlyn's son with ex-wife Chrystie Scott, Burt -- named after Caitlyn's younger brother who passed away from a car accident -- recently uploaded a photo of his dad on Instagram who appeared to be quirkily posing and having fun with two young girls, E! Online reports. The same report believes that the two girls are Casey Jenner's daughters -- Burt's sister and Caitlyn's daughter. Remarkably, the adorable photo was posted a day before Caitlyn, formerly Bruce Jenner, had legally changed her name and gender. While the picture is obviously a happy one, Burt has seemed to take the opportunity to chastise his father's critics by captioning the photo with:

"So obviously a lot has changed... But thankfully, for me, the most important stuff didn't... My dad still loves toys, fun toys, still likes to go fast, still loves adrenaline... And will still whip your ass at... ANYTHING... Yup all you haters, my dad will still probably whip your ass at 65 with implants."

He continued:

"Oh "no"? There were a lot of world class athletes that said the same thing... And lost... Sure, I believe you, since you have comparatively accomplished so much with your life."

Meanwhile, Caitlyn has successfully completed his transition last Friday. In another report by E! Online, The 65-year-old I Am Cait reality star's name and gender have been legally approved by the court after just a week of processing. She is now officially known as "Caitlyn Marie Jenner" and has indicated the reason of her name change as "to better match my identity" as per E! Online.

It can be recalled that Drian Juarez, a representative from the Los Angeles LGBT Center, advised Caitlyn about the tedious "name-changing process" in a previous episode of I Am Cait,

"You have to go through the court-ordered process, which has been streamlined a bit," Juarez tells Caitlyn. "Before, you had to have gender-confirmation surgery before you could change your gender marker. There was advocacy done to change that and now you just have to have clinically appropriate treatment to change your gender marker," Juarez adds as per E! Online.

"After hearing all the struggles people go through because they don't have the proper documentation, I realized that I should be a little bit more aggressive in dealing with this issue of my identity," Caitlyn remarks. "I think it's time to get that process started," she resolves.

Caitlyn decided to organize and throw name-changing ceremony to celebrate her new identity. However, it's not entirely a self-serving event as she also kept in mind the rest of the transgender community who "just went through" the legalities.

"Outside right now, they are setting up for my name change. All of the girls, all of my little tribe, have told me that they never really celebrated their name change. They just kind of went through it," Caitlyn narrates. "So, it's not just for me. Really, it's about all of them," she added.