polytonic

A group of people all in a platonic relationship with one another.

Person A: Hey look at those guys!
Person B: Yeah, they must be in a polytonic relationship.

polytonic singing

singing two melodies at once, while when you're not focused on the higher notes behind it it just sounds like "EEEEEEEUUUUUUUUURRRRRREEEEEEEEEEH"

"EEEEEEEUUUUUEUEUUUEUUUEUURRRRRRREEEEEEHHHHH"
"what are you doing"
"im practicing my overtone polytonic singing"