moiderer

"moiderer" is an old or dialect word meaning murderer as pronounced by some speakers of new york city english with the highly-stigmatized curl-coil vowel merger. If your teen uses it, they have most likely picked it up from a book, video game, period drama, or a regional grandparent rather than a modern peer group. There is no cause for concern here; the word is largely out of contemporary teen usage. If it appears in a school text, it is being studied for vocabulary or historical context. You can treat it like any other archaic vocabulary item.

"moiderer" is obsolete or literary English meaning murderer as pronounced by some speakers of new york city english with the highly-stigmatized curl-coil vowel merger. It is mainly used in North American English. A more formal or neutral equivalent would be something like "murderer as pronounced by some speakers of new york city english with the highly-stigmatized curl-coil vowel merger" expressed in standard vocabulary. A common mistake is to use "moiderer" in modern conversation; it will sound strange or theatrical. Recognise it in older texts, but use the modern equivalent when speaking.