adjective

abrupt or offhand in speech or manner.

she could be brusque and impatient

curt,abrupt,blunt,short,sharp,terse,brisk,crisp,clipped,monosyllabic,peremptory,gruff,bluff,caustic,tart,abrasive,outspoken,plain-spoken,indelicate,tactless,undiplomatic,discourteous,impolite,rude,uncivil,offhand,snappish,snappy,churlish