brash

Overly bold or self-assertive to the point of being insensitive, tactless or impudent; shameless.

a brash young businessman; a brash tabloid; a brash sense of humour

Mrs. Mayfield looked away, and the girl stricken with remorse, hastened to her and said: “There, I have been too brash, haven’t I? You must forgive me for I didn’t intend to be brash.” “Brash, my dear? What do you mean by that?” She laughed. “Why, I thought everybody know’d what brash meant. Well, it’s er—too quick to say somethin’ you oughtn’t to say.”

Overly bold, impetuous or rash.

[…] just because you’re a little hot under the collar, don’t do anything brash, for fear you may regret it afterward.

Now, Mr. Reed, you’ve committed nothing but a brash act of bad taste by bypassing the standard channels.

Bold, bright or showy, often in a tasteless way.

brash colours

a brash perfume

A rash or eruption; a sudden or transient fit of sickness.

A sudden burst of rain.

An attack or assault.

To disturb.