Brash (adjective)

1. Impulsive and lacking in tact.
2. Showy or overly confident in a bold or attention-seeking manner.
3. Loud, rude, or lacking in restraint or respect.
4. Rude or ill-mannered.
5. Hasty or lacking in caution or judgement.

Origin:

The word 'brash' originated in the late 16th century from the middle dutch word 'bras', meaning 'rough' or 'harsh'. over time, the meaning of the word evolved to refer to someone or something that is impulsive and lacking in tact.

Examples:

1. The young, brash entrepreneur was always quick to make a bold move, often without considering the consequences.
2. She was often criticized for her brash behavior and for saying things without thinking them through.
3. His brash comments at the meeting earned him a reprimand from the CEO.
4. Her brash personality made her a lot of enemies, but also earned her a lot of admirers.
5. His brash actions got him in trouble, but they also helped him achieve his goals.