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An angry, possibly magical, woman who is either addicted to, selling, or in possession of methamphetamines. Will occasionally lace brownies with meth and offer them to small children.

Also a derogatory term towards women and witches alike.
Awww... That poor child! I wonder how he got addicted to meth?
Well, his mother is a methwitch.

My girlfriend is being a total methwitch!
by imnotababyimatumor October 21, 2011
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