rascal
noun
1 what's the little rascal been up to now?:
scallywag, scamp, devil, imp, monkey, mischievous person, mischief-maker, wretch;
informal horror, monster;
British, informal perisher;
Irish, informal spalpeen;
Northern English, informal tyke, scally;
North American, informal varmint, hellion;
dated rip;
archaic rapscallion, scapegrace.
rascal Oxford Dictionary of English