If you tell the captain of the basketball team that you're going to beat him at a game of hoops even though you've never played, you're speaking with a lot of bluster or false confidence and bravado.

Bluster can also mean a strong wind. On a blustery day, you'll see trees blowing and people holding onto their hats. When someone full of bluster is talking about how they can do something that you think they can't, they're blowing a lot of hot air in your direction. And coincidently, another name for that type of person is a blowhard.

Definitions of bluster

v blow hard; be gusty, as of wind

“A southeaster blustered onshore”
“The flames blustered
Type of:
be blowing or storming

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

swagger, swash
Type of:
act, behave, do
behave in a certain manner; show a certain behavior; conduct or comport oneself

v show off

blow, boast, brag, gas, gasconade, shoot a line, swash, tout, vaunt
speak in a blustering or scornful manner
crow, gloat, triumph
dwell on with satisfaction
congratulate, preen
pride or congratulate (oneself) for an achievement
Type of:
amplify, exaggerate, hyperbolise, hyperbolize, magnify, overdraw, overstate
to enlarge beyond bounds or the truth

n a violent gusty wind

Type of:
blast, blow, gust
a strong current of air

n noisy confusion and turbulence

“he was awakened by the bluster of their preparations”
Type of:
disorder resulting from a failure to behave predictably

n vain and empty boasting

braggadocio, rhodomontade, rodomontade
Type of:
boast, boasting, jactitation, self-praise
speaking of yourself in superlatives

n a swaggering show of courage

Type of:
fanfare, flash, ostentation
a gaudy outward display

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