You could say:
Nathan's heart was beating loudly and feared his girlfriend would hear it, however he continued to act nonchalant.
His heart pounded in his chest, and he tried to look nonchalant.
I was nonchalant about coming to work without a tie.
Example sentence - He acted quite nonchalant about the evening with her.
The man was nonchalant
Nonchalant, he lifted her skirt, (which was hanging on the clothesline).
If you are nonchalant instead of remorseful, the judge will give you a very strict prison sentence.
I couldn't understand how she could be so nonchalant about a job interview with such a prestigious law firm.
"The young composer was very nonchalant about winning the Pulitzer Prize for music, as if it were something every young composer did."
She is so nonchalance.She gave a nonchalant shrug.
How can you be so nonchalant about such an important job interview?He was nervous about asking her out, but he tried to seem nonchalant.The judge seemed annoyed by Lindsay Lohan's nonchalantattitude in court.
If you appear before the judge with a smug, nonchalant attitude, he's more likely to impose the maximum sentence.
Nonchalant was born on 1970-10-18.
Not necessarily but a nonchalant attitude can be viewed as noncaring or detached.
Nonchalant.