[Jandek] kill your timid notion

[Paul Condon]

"Kill Your Timid Notion" is not the title of a Jandek song (hence the
lack of response to your query) - it was the name of a festival in
Dundee, Scotland a year ago:

www.killyourtimidnotion.org/

Don't know whether it comes from something else.
If you post some of the lyrics of the song it'd be easy to identify...
but from the description,  I suspect you might be referring  to
"Om"...  which is  just several voices chanting "Oooooommmm..." Does
this sound right?