When your upper and lower front teeth get knocked out by a large flash light, usually after challenging an officer’s authority.
He keeps talking all this sovereign citizen shit to cops. I give it two months before he comes back home with maglite mouth.
Someone who gives information (tattle) to the authorities or bosses at any opportunity, especially when it gets worse like a disease.
See also
I got back from lunch 5 minutes late and Chris told the boss, hes a real swine mouth.
He's got a bad case of Swine Mouth.
The apparent inability of some white Americans to pronounce non-Anglo-Saxon names correctly. In particular, the clearly deliberate mispronunciation or dispronunciation of such names by a member of the white elite as a way of implying social superiority and deprecating non-white origins. This form of speech suggests a link between the speaker and the original 102 Mayflower settlers, whose names are typical of common early 17th century English names.
Another term for the same syndrome is 'Hamptons lockjaw'. The Hamptons in Long Island are a popular vacationing spot for the wealthy, with some of the highest real estate values in the USA. This term is likely to be a variant on 'Locust Valley lockjaw', or 'Larchmont lockjaw', which make similar geographical references. All are synonyms for the Mid-Atlantic Accent, a mixture of American and British speech habits which was deliberately adopted from the early 20th century by members of the social elite in certain of the original Northeastern colonies - for example, the Boston Brahmins - as a mark of difference and superiority. It was, and is considered unnatural by many because of its exaggerated articulation, involving much clenching of the jaw.
That guy's got a real bad case of Mayflower mouth - he just won't say 'Kamala' right, even after he's heard it. It's insulting.
When your mouth is flapping up and down like a kangaroo jumping
"Shut your dumb kangaroo mouth!"
when one covers their dick with onion and garlic residue then has a woman give her a blowjob. The result is ogre mouth.
That bitch was crazy, so I gave her ogre mouth
a person who utters bitter or insulting or venomous remarks against somebody. As a verb, it can be used to mean 'to utter such remarks'.
He broke with his girlfriend because she was such a poison-mouth.