The full title is, “The Adventures of Buckaroo Banzai Across the 8th Dimension”.
I’ve seen it many times. Personally, I thought it was dumb… with a capital D! I’m not saying it was a bad movie, just a dumb movie. They tried to make it a cross between a science fiction movie and a screwball comedy. Unfortunately, they had the main lead play it serious, while everyone else did (bad) comedy. John Lithgow tried to do a good job, but the material was simply lame! (“Bring me the over-thruster!”)
I think it was trying to appeal to a juvenile audience (it was a comic book after all). Some of the names they used sounded like they got them off a bathroom wall at a middle school - John Smallberries, John Bigbooty. Yet the “heroes” were something out of a 50’s novel. Something juveniles (at the time) probably couldn’t relate to. And why did the “good” aliens from planet 10 look and sound like they were from Jamaica (mon)?
The movie has gained cult status, much like “The Rocky Horror Picture Show” (which also was bad).