/ bræʃ; NAmE / adjective ( disapproving )
1.
confident in an aggressive way :
Beneath his brash exterior, he's still a little boy inside.
2.
( BrE ) ( of things and places ) too bright or too noisy in a way that is not attractive
► brash·ly adverb
► brash·ness noun [ U ]
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WORD ORIGIN
early 19th cent. (originally dialect); perhaps a form of the adjective rash .