Trivia: Will Smith dismisses the new task force "AMMO" as "a high school musical boyband with guns." AMMO member Kelly is played by Vanessa Hudgens, who starred in the High School Musical franchise.
Trivia: During Meghan Burnett's wedding, the guy on the mic giving a quick speech is none other than Bad Boys 1 and 2 director Michael Bay.
Trivia: One of the two girls who does not allow Mike and Marcus into the club is Martin Lawrence's real-life daughter, Jasmine Lawrence.
Trivia: The man who hits on Rita at the club is director Bilall Fallah, while the man whose car is taken by Mike Lowrey when leaving the club is director Adil El Arbi.
Trivia: In the trailer Martin Lawrence gets out of the passenger side of Will Smith's valuable car and his door gets damaged hitting a fire hydrant. This is a reference to an actual behind-the-scenes moment in Bad Boys 2 when Lawrence did the same thing, hitting a concrete barrier whilst exiting the expensive Ferrari used in the film. It infuriated Michael Bay and Lawrence was highly apologetic.
Answer: It's not about the relationship. Calling someone "Grandpa" is used as an insult to mean they are old.
raywest ★
But the point is Will Smith's response - "f*cking your mother" wouldn't ever make them someone's grandpa.