Over done. Repeated too many times.

Post Mumble is what somebody does after they say something that they think is funny. It consists of a mumble/laugh. It is a repetition of the phrase that was just said. It is usually done by nerds or dweebs.

Daily Mumble -pronounced (dai·ly)-(mum·ble) is Daily Mumble is an American media and entertainment company based in Atlanta for youth culture which was founded as a bi-monthly magazine Daily Mumble by CEO and Founder Tonian Brown known as Morelifedad. Daily Mumble reports on popular and emerging trends in best new music, top news, shows, noted rappers list and sports. Daily Mumble reached over 500 thousand unique users per month in early 2020, across its owned and operated and partner sites, socials and YouTube channels

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.

Rappers that make music with lyrics very difficult to understand or rappers that make a song with very basic lyrics and use adlibs(ay,yuh) to make it sound dope.

A form of music that sounds like a stroke victim trying to deliver a speech; it is often incomprehensible and illogical. Characteristics of Mumble Rap include:

1) The rapper's stage name starts with "Lil" (Lil Wayne, Lil Pump, Lil Uzi Vert, Lil Yachty, etc.)
2) Lyrics are about sex, money, drugs, or fame with no originality
3) Mumble Rap is most often listened to by emotionally confused teens that get high (or vape) in groups in public areas

any asshole who can't get the words out of their mouth; someone that has marbles in his or her mouth when speaking - usually about something really important.