TO PUT it bluntly, we're all f---ed. It might be therapeutic to let off a stream of expletives if your team is getting flogged or if you hit your finger with a hammer, but it can also be illegal.

And under laws set to be introduced to State Parliament this week, Victoria Police will get permanent powers to slap potty-mouthed perpetrators with on-the-spot fines of up to $240 for using language deemed to be indecent, disorderly, offensive or threatening.

Watch your mouth ... on-the-spot fines are set to be handed out for offensive behaviour and indecent language.

The crackdown — which extends the Baillieu government's ever-growing law-and-order agenda — means police will be able to issue infringement notices for offensive behaviour and indecent language similar to parking and speeding fines.