discourteous (adj.)

• abrupt
• aweless
• boorish
• brusque
• curt
• derisive
• disparaging
• disrespectful
• ill-bred
• ill-mannered
• impertinent
• impolite
• impudent
• insolent
• irreverent
• rude
• short
• unaccommodating
• uncivil
• ungallant
• ungentlemanly
• ungracious
• unladylike
• unmannerly