Mumble-Talk 

Mumble-Talk
Is when someone is talking foul about you but won’t make themselves clear.

mumbling something negative about you but won’t make themselves understood.

mumbling Trash talk behind your back.

Max: Hey bruh you love to Mumble-Talk behind people’s back.

BY: MillYentei DYSlick July 17, 2020

Mumble-Talk by MillYentei DYSlick September 17, 2020

mumbletank 

This is the place in which a person will find themself after they have consumed so much alcohol, chronic or other mind-altering substances that anything and everything that comes out of their mouth will be completely and utterly unintelligible.

That cretin just chugged 2 pints of MD/20-20 and he will be deep in the "mumbletank" for the foreseeable future.

mumbletank by FastEddie, KOS May 1, 2009