The Brief: CornTeen is a fun way to say "quarantine," usually in reference to COVID-19 isolation and quarantine measures.

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Cornteen or Corn Teen are ways to say “quarantine.” Popular online, this spelling can be either an intentional misspelling of the word or a way to illustrate how people with certain accents would pronounce quarantine. As the spread of COVID-19 has caused many people to quarantine or self-isolate, the term has become a fun way to talk about it.

Corn-teen. Can’t take credit for this, but it’s perfect. from maryland

An actual Corn Teen:

Corn teen. from funny