bluster

Noun

• vain and empty boasting

• a violent gusty wind

• a swaggering show of courage

• noisy confusion and turbulence
  • he was awakened by the bluster of their preparations
    

Verb

• act in an arrogant, overly self-assured, or conceited manner

• show off

• blow hard; be gusty, as of wind
  • A southeaster blustered onshore
    
  • The flames blustered
    

Related words

• Synonyms: 
  braggadocio , rodomontade , rhodomontade , bravado , swagger , swash