When someone only remembers the music to a song, but not the lyrics. I came up with the word while playing scrabble. It's a combination of humming and memory.
Hummorny is a definition of someone that will take humms as their mejor strand in SHS
Gab: bro im gonna take the Humms strand in shs
You: The only reason you're going to take that strand is because you wanna hummorny your instruments
Gab: Damn, you right