rascal

(n) a deceitful and unreliable scoundrel knave, rapscallion, rogue, varlet, scalawag, scallywag,
(n) one who is playfully mischievous scamp, imp, monkey, rapscallion, scalawag, scallywag,

knave rapscallion rogue varlet scalawag scallywag scamp imp monkey

rascality rascally