nonchalantly
/ˌnɑnʃəˈlɑntli/
adverb
- In a calm, relaxed way that shows no worry, interest, or excitement.
- She nonchalantly tossed her bag onto the chair and sat down.
- They nonchalantly walked past the crowd as if nothing had happened.
- He nonchalantly answered the phone while the alarm was ringing.