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Angus Cloud 's mom is striking back at lawyers she claims have been hounding her with bogus claims against the "Euphoria" star's estate ... according to new court documents.

In the two years since losing her son to an accidental overdose, Lisa Cloud -- who administers Angus' estate -- claims in a new lawsuit she has suffered elder abuse, emotional distress, and more in connection with a claim from an alleged former "personal assistant" of Angus against her son's estate.

Lisa is going after the firm Hackard Law, attorney Michael Hackard , and associate Brian Geremia for filing what she's calling "meritless creditor's claims and a civil action" seeking around $310K against Angus' estate without sufficient evidence.

According to the complaint, this forced Lisa to spend "appr

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