Lindsay Lohan is getting pretty aggressive when it comes to her club businesses. According to Page Six, the star opened a club called Lohan Beach House on the hip Greek island of Mykonos, and was apparently heard bragging that she tipped off the Greek tax authorities about rival club Nammos — and that it’d been shut down for a month.

Nammos was shut down by the Greek version of the IRS on Friday, but it’s not clear whether she dropped a dime or if she was just claiming credit.

“She told everyone on the island that she called the Greek IRS to shut [Nammos] down and got them shut down for 30 days,” said an insider. They added, “So people would come to her [club instead]! So f - - ked up!”

By the way, Kate Moss, Gigi Hadid and Emily Ratajkowski were on Mykonos for the launch of Nammos’ new upscale mall, Nammos Village. But the Greek Reporter website said Saturday that the party was halted.

“Greek tax authorities ordered the world-famous beach bar restaurant of Nammos in Mykonos to shut down for 48 hours on Friday due to tax evasion,” it reported. It claimed that tax inspectors “found that the company had not issued 250 receipts worth 73,000 euros ($85,000) and ordered Nammos to remain shut until Sunday.”