Related Clues:

• "That's right!"
• Undiplomatic
• Lacking in tact
• "No lie!"
• Not respectful
• Matchless, e.g.
• Adjust, as wheels
• Graceless
• Unlike 666
• Not according to Miss Manners
• Like a pusher, maybe
• Like all but one prime
• Blue leader?
• Prompting a 'hmm,' perhaps
• Ungentlemanly