TYGA A LANDLORD'S WORST NIGHTMARE Racks Up Hefty Party Fines

Tyga has neighbors in his fancy gated community pulling their hair out ... because they say he's repeatedly broken HOA rules, and racked up over $10k in unpaid fines for constantly throwing ragers.

Sources tell TMZ ... Tyga's been blowin' the roof off his Calabasas home in The Oaks development -- inviting too many guests to his parties, and letting them enter without proper security clearance. The homeowners' association has hit him with the fines, but it's having zero effect.

Since last August, Kylie Jenner's BF has paid a little here and there, but he's largely ignored the dozens of notices and warnings. We're told he was even banned from all common areas of The Oaks.

Here's the real kicker ... since Tyga rents, technically his landlord is on the hook -- but obviously, he's trying to get Tyga to cough up the dough.

Get in line ... said Blac Chyna.