Long story short, it's an instrumental by the brutal and best band ever, sadly, it doesn't seem to have a meaning, or a proper pronunciation meaning it can't be your favourite song.
Him/her: hey! What's your favourite song?
You: neonatalimpalionecrophiliation
Him/her: (confused glance) ok... WHAT THE FU...
by Not Caleb foster September 11, 2019
Get the neonatalimpalionecrophiliation mug.