The Situation -- Landlord Says WORST TENANT EVER

The Situation has both the civil and criminal courts covered in New Jersey ... because his landlord will ask a judge on Monday to boot Sitch from his home.

Pat Giganti is a tolerant if foolish man ... he rented to The Situation once before and got burned -- the "Jersey Shore" star trashed his $750,000 home 2 years ago.

But Giganti -- clearly a glutton for punishment -- rented Sitch another home worth around $700K in Manchester, NJ ... and apparently history has repeated itself.

The landlord claims there are bottles at the bottom of the pool, rips in the pool liner, holes in the wall and a ton of other problems that go with big, drunken parties.

And there's this ... the landlord says Sitch is a deadbeat who's behind on rent.

In the greater scheme of things it's small potatoes ... the reality star faces hard time if he's convicted of tax fraud.

Fame ... sometimes it really is a bitch.