Related Clues:

• 'I don't want to hear any more!'
• 'Stop right there!'
• 'I've had enough'
• Instruction at many a corner
• Intersection sign
• Investor's order
• Hang it up
• Word on an octagon
• Proctor's call
• 'Give it a rest!'
• Not too few
• Sort of sign
• Stop!
• Pull over
• 'Whoa!'