In his first post, Gibson called Johnson "selfish" for agreeing to a spinoff film with Jason Statham without considering Gibson's situation, referring to his ongoing custody dispute with his ex-wife Norma Mitchell.
"I can't afford to fight for my baby anymore so they're likely going to take her away," Gibson wrote, telling Johnson to make sure he kissed his own daughters when he gets home. "I'm almost broke swimming in legal fees."
"Thanks Dewayne see you guys in 2020 and I will not delete this post cause the TRUTH of selfish people in Hollywood needs to be mentioned," he continued. "To this day Dewayne has NOT called me back as u see me crying every 3 hours over my baby know #ShaylaRocks."
The former R&B singer further said that he is unable to book any acting work because "my ex wife killed my reputation so no one wants to hire me."
"I'm sorry to announce that if Dewayne [sic] is in Fast9 there will no more Roman Peirce [sic]," he wrote later in the day. "You mess with family and my daughters survival I mess with yours."
"Close your eyes dude you're a 'Clown' ... My real ones out here stand UP...... folks that GP to the gym and get big naturally #NoJuice #NoOJ spin off huh? Spin off these nuts selfish champ," he added, alongside a photo of Vin Deisel hugging Gibson. "Notice who's got his arms around my shoulder and who's standing alone - #OurChildrenMatter."
He also included the hashtag #CandyAssBitchMade.
This is not the first time Gibson has gone after Johnson publicly through social media. Just last month, when "Furious 9" was bumped from a 2019 release to 2020, Gibson wrote, "Congratulations to TheRock ... for making the fast and the furious franchise about YOU."
He went on to write, "Gn folks see you in 2020 April FastFamily right? Nah..... it's about TeamDewayne."
Without naming names, Johnson addressed the ongoing feud over the spinoff with an Instagram post of his own in early October. "I want to use my spinoff platform to create new characters that fans will ultimately love to have fun with in multiple chapters and platforms," he wrote. "Let's have some FUN and to quote, Hobbs the boss, if you don't like it, we're happy to beat that ass like a Cherokee drum."
He closed his comment with the hashtag #CandyAssesNeedNotApply.
Universal Pictures is currently in development with Johnson and Statham for a spinoff film starring their "Fast & Furious" franchise characters. The release date for "Fast & Furious 9" has been bumped from April 19, 2019 to April 10, 2020.