To be nonchalant about something means that someone is very easy going about something and acting as if it is easy or is not really that big of a deal to them.
Not necessarily but a nonchalant attitude can be viewed as noncaring or detached.
"The young composer was very nonchalant about winning the Pulitzer Prize for music, as if it were something every young composer did."
Nonchalant means rude and not proper so if someone would have that attitude it would mean that person wasn't a very polite person.
Nonchalant means not concerned or indifferent.
The man was nonchalant
Nonchalant was born on 1970-10-18.
Nonchalant, he lifted her skirt, (which was hanging on the clothesline).
When You Try
Example sentence - He acted quite nonchalant about the evening with her.
You could say: Nathan's heart was beating loudly and feared his girlfriend would hear it, however he continued to act nonchalant.
I think it might be nonchalantly. Nonchalant means showing indifference. For example: The girl was unmistakably nonchalant; she was the only one in the crowd of "fans" at the concert that was standing there not screaming and yelling and flailing her arms. Nonchalantly would be for example, doing something with boredom, or unconcern.
You don't try your best at something