Related Clues:

• Lacking culture
• Disrespectful
• Insulting
• Not at all polite
• Oil by the barrel
• Needing refinement
• Tanker filler
• Intentionally impolite
• Primitively simple
• Like cutting in line, e.g.
• Like oil directly from a well
• Bad-mannered
• In need of a slap
• Unrefined oil
• Unrefined cargo