Brash/bræʃ/ Definition 1 of 3Pro Tip 1/3Negative Impression Using 'brash' may suggest that someone is unlikably bold or too direct. His brash comments at the meeting didn't win him any friends. Pro Tip 2/3Informality 'Brash' is often used in informal settings, less in professional or academic contexts. The comedian's brash humor was perfect for the late-night show. Pro Tip 3/3Cultural Nuance In some cultures, 'brash' behavior might be seen as energetic and confident. He thinks being brash will make him popular here, but it might backfire.