Belembaotuyan is a word from the Tagalog language. It is made up of four syllables: bel-em-ba-o-tu-yan.
Think of it like playing a game of "Simon Says." If Simon says "touch your nose," you touch your nose. If Simon says "touch your toes," you touch your toes. But if Simon says "touch your belembaotuyan," you might get confused because you don't know what that means!
So what is belembaotuyan? Well, it's actually not a real thing. It's a nonsense word that some people use to try and trick others or to confuse them.
So if someone asks you to touch your belembaotuyan, you can just laugh and say "that's not a real body part!" And now you know!