trivial; not amounting to much; not enough to cause a problem; not as much as expected
unintentionally; inadvertently; calmly; casually; nonchalantly; innocently
nothing special; no big deal; doesn't matter
this and that (esp. complaining or protesting); something or other
It's nothing!; Don't mention it!
certain person; certain amount
how could I (you, etc.) ...?; how dare you (they, etc.) (have the nerve to) ...?