Possible Clues:

• "That's just wrong"
• 'Way over the line, bud'
• "That crossed the line"
• "That was over the line"
• "That was over the line!"
• 'You're way over the line'
• "You're way over the line"
• 'That was totally out of line'
• 'Lame thing to do'
• Rather inappropriate