mumblecore 

a group of filmmakers who make performance-based films that focus on the everyday problems, often about relationships, of middle-class twentysomethings.

"I just wasted 2 hours of my life watching the mumblecore film, Mutual Appreciation."

mumblecore by robottt December 9, 2008

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

Code Mumble 

In order to maintain attention and focus during problem solving, a person may mumble random details related to the task. This can also help to drown out external noise and distraction.

Commonly occurs when software developers are deep in code but surrounded by noise and chatter.

A programmer talks to himself in code mumble, repeating logical steps to solve a problem while semi-engaged in office conversation.

Code Mumble by Daniel Kianka July 4, 2008

mumble pants 

when your pants are so tight you can see a womans lips move

hey mumble pants i can see your lips moving but i can't hear what you are saying

mumble pants by skeeter April 8, 2004

mumbledrunk 

when you get so drunk, everything that you say is mumbled.

Daphne drinks so much that when she speaks she sounds like a mumbledrunk!

mumbledrunk by big oakie shooter November 20, 2010

Mumble Rap 

A Rap song sung in very low tone or with no character (robot voice) or can barely be understood

Dude Lil Pump Makes Mumble Rap

Mumble Rap by Harvard_Dropout August 8, 2018

Song mumbler 

When listening to a song, usually in a car, a person tries to sing the song because he?she thinks they know the lyrics when half the time they are just mumbling

Idiot- i love this song, im gonna sing the whole thing

Driver- Ya, i bet ur a song mumbler

Song mumbler by BufSabres February 25, 2009