To be “jit trippin'” is to act or say something genuinely crazy - jit (slang for “legit”) + trippin' (slang for acting/saying something ridiculous) = new made up slang phrase for legitimately acting like a fool.
users i know and the song that comes to mind and where i first remember them [trend maybe]; spire: best friends forever- eddsworld
danny: good riddance- the radio that one time
breezy: we'll meet again- gravity falls
merioux: toredor march- appeared in my youtube fees before i even knew fnaf
cinna: homelander theme- random ass meme
.KRAD: deja vu- initial D
iceu: compilation of people calling you a bitch- never heard it. just wanted him to know that