A popular phrase used by Popular rapper Eminem (M&M, slim shady, weird beard, white guy from D12) in his freestyle "Eminem Rips Donald Trump In BET Hip Hop Awards Freestyle Cypher"
When you see someone behave rather cheekily they may be an awfully atrocious rapscallion.
1. Oh my! I had one to many biscuits today and I'm in a bit of a silly mood! I think i may be an awfully atrocious rapscallion
2. You are being a bit of a Squadaddle pop! I think that you, fair sir, may be an awfully atrocious rapscallion.