'Rapscallion' definitions:

Definition of 'rapscallion'

From: WordNet
noun
A deceitful and unreliable scoundrel [syn: rogue, knave, rascal, rapscallion, scalawag, scallywag, varlet]
noun
One who is playfully mischievous [syn: imp, scamp, monkey, rascal, rapscallion, scalawag, scallywag]

Definition of 'Rapscallion'

From: GCIDE
  • Rapscallion \Rap*scal"lion\ (r[a^]p*sk[a^]l"y[u^]n), n. [See Rascallion.] A rascal; a good-for-nothing fellow. [Colloq.] --Howitt. [1913 Webster]