Face like a slapped arse means: This is the scottish expression for blushing. (in Community Dictionary, added by Román Santos)

What else does Face like a slapped arse mean?

  • If bitchy girls believe they’re better than others and can’t achieve what they desire. (in Community Dictionary, added by Ethan Donovan)
  • A dissatisfied or angry face can cause a less flattering appearance. (in Community Dictionary, added by Romualdo Moya)