What does «pilluelo» mean in Spanish?

/f. Naughty, especially said of a child. One who plays tricks, pranks or mischief.

Examples of use in Spanish: "¡Qué pilluelo este Juancito!".

"Tiene unos diez u once años y cara de pilluelo, ojos chispeantes".
Rascal, rascal, scoundrel.

Examples of use in Spanish: "es un pilluelo de la más baja calaña".