When Hot Rod & Kup crash-land on the garbage planet, whose inhabitants promptly surround our heroes, Kup resorts to the "universal greeting," which goes something like this:
Bah-weep-Graaaaagnah wheep ni ni bong
Even when I was a kid, this stood out as strange. Not only is it a bizarre set of sounds to make with no obvious precedent, no real translation is offered. Does it mean "hello?" Or, "we come in peace?" Or "we seek asylum?" It is just a salutation, or does it make an assertion about the speaker, or does it request something from the hearer?
My question is: what is known about this so-called "universal greeting," in-universe and out?