(as) bold as brass

: fearless before danger : intrepid

: showing or requiring a fearless daring spirit

: impudent, presumptuous

: boldface

: an alloy consisting essentially of copper and zinc in variable proportions

: the brass instruments of an orchestra or band

: a usually brass memorial tablet

: made of brass — see also brass ring, brass tacks

: made up of or composed for brass musical instruments — see also brass band