Humstrum 

A cats gut stretched across a pigs ass that you pick your teeth with.

Girl: Daddy can I have ice cream?

Dad: Leave me the hell alone or I will give you the humstrum.

Humstrum by Sgt.Politeness August 19, 2011

humstrumental 

Verb.
1. The act of humming either words or chorus of any song that you have forgotten the lyrics to.
*we ALL do it!
😁

"What are you singing?"

"I'm not singing, it's the humstrumental to the song, ###."
"YOU are insane."
"YOU knew that when you married me."

humstrumental by Ajaya72 September 10, 2022