1.
anything is fine, I don't mind, whatever
Used to indicate that the speaker has no preference and is happy with any option. Very common in everyday conversation when asked to choose.
Usage
なんでもいい is extremely common in casual conversation, especially when responding to questions about preferences. Note that repeatedly saying なんでもいい can sometimes frustrate the person asking, as it places the burden of choosing entirely on them.
The polite form is なんでもいいです or なんでも構いません.
Related words
Related Words
Related:
どこでもいい (anywhere is fine)
Related:
いつでもいい (anytime is fine)
Compare:
どっちでもいい (either is fine)