. While the show's actual opening theme is an orchestral piece by Danny Elfman, "tram pararam" (or "pam pa-ram") is how fans often mimic the rhythmic brass section.
: You can find collections of related images and photos on platforms like Storyboard That . the simpsons tram pararam link
You're referring to the infamous "Tram-Pa-Ram" episode of The Simpsons, which has been linked to a alleged prediction of Donald Trump's presidency. the simpsons tram pararam link