Varlet
Part of speech: noun
Definition: A servant or attendant. Specifically, a youth acting as a knight's attendant at the beginning of his training for knighthood. A rogue or scoundrel. The Jack.
Rascal
Part of speech: noun
Definition: Someone who is naughty; either playfully mischievous or a troublemaker, a dishonest person, a scoundrel.
Part of speech: adjective
Definition: low(ly), part of or belonging to the common rabble
Example sentence: I don't suppose there is a more daring or more impudent rascal on earth than a good American beggar. It is always his boast that he has begged an ex-president, or the present one, and he claims to have received benefits from a number of well-known millionaires, actors, and prize-fighters.