brash

Short definition from Wiktionary

Adjective

1. 1
   Overly bold or self-assertive to the point of being insensitive, tactless or impudent; shameless.
2. 2
   Overly bold, impetuous or rash.
3. 3
   Bold, bright or showy, often in a tasteless way.
4. 4
   Brittle (said e.g. of wood or vegetables).

Noun

1. 1
   A rash or eruption; a sudden or transient fit of sickness.
2. 2
   A sudden burst of rain.
3. 3
   An attack or assault.
4. 4
   Leaf litter of small leaves and little twigs as found under a hedge.
5. 5
   Broken and angular rock fragments underlying alluvial deposits.
6. 6
   Broken fragments of ice.

Verb

1. 1
   To disturb.

Proper noun

1. 1
   A surname.