It's likely you're asking about "are darn." This phrase isn't grammatically correct. It's possible you're encountering a misspelling or a colloquial expression specific to a particular region or group.
Here are some possibilities:
* A typo: Perhaps the intended word was "aren't" or "are darned".
* Slang: "Darn" can be used as an intensifier, similar to "very" or "really". In this case, "are darn" might be a slangy way to say "are very".
To understand the meaning, you'll need more context. Can you provide the full sentence or phrase where you saw "are darn"?