el / lacanalla

scoundrel; rascal

Ese canalla estafó a media familia y nunca devolvió el dinero. That scoundrel swindled half the family and never gave the money back.

No seas canalla: devuélvele el dinero que le debes. Don't be a rogue: give him back the money you owe him.

roguish; cheeky (adjective)

Tiene un humor canalla que a todos nos hace reír. He has a cheeky, roguish sense of humour that makes us all laugh.