bravado
In a foolish act of bravado, I chose to ignore my friend's warning about the strength of the liquor.
He produced a knife and pointed it at them in a desperate act of bravado.
Her rivals shrugged off her threat as just another act of bravado.
It was an act of bravado to tell his boss to resign.

SMART Vocabulary: related words and phrases

Doing things without fear or proper thought
bravado
carpe diem
daredevil
desperado
devil-may-care
hotheadedness
impetuosity
impetuous
impetuously
impetuousness
precipitancy
precipitant
precipitate
precipitately
precipitation
rashness
reckless
trigger-happy
unafraid
with no thought for somethingidiom