A condition present in meth smokers where teeth rot and fall out.A few theories exist as to what causes this;
1) Meth dries out your salivary glands thus making them more vulnerable to the acidic nature of the drug.
2) People drink sugary soda and eat candy to alleviate the dryness,and ignore their hygiene as a result of the addiction.
3)or they habitually grind their teeth.
That white trash bitch smoked so much meth,she got meth mouth and all of her teeth turned black.