It's said about the people who, being idle, spend their time in pernicious activities.
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Es diu de la gent qui, estant ociosa, malbarata el seu temps en activitats pernicioses.
Example:
―Mike says that he's bored, because he has lost his job, and now he's always at home playing videogames and getting stoned.
―To those who have not job, the Devil gives them some.
Exemple:
―Miquel diu que està avorrit, perquè s'ha quedat sense el seu treball, i ara no fa més que jugar a videojocs i estar fumat.
―Qui no té faena, el dimoni li'n dona.