Michael Lohan is livid over a new rumor surrounding him.

How he can even keep them all straight, with all the shady things he does and is accused of, we don't know. But this one is particularly offensive to him.

His ex-girlfriend, Erin Muller, alleges in legal documents filed this week that Michael was abusive quite a lot, and once even kicked her in the vagina.

She also detailed several other instances of verbal and physical abuse over a span of a year or so. Dude treated her like garbage 24-7, essentially.

M-Lo says these allegations are "patently untrue."

Mike and Erin in pre-vadge-punting times.

Michael’s lawyer says Erin Muller made everything up after he "terminated" their engagement. Yes, she at one point agreed to marry Michael Lohan.

His legal team also says her story is “a desperate attempt to dismiss the allegations against her.” Michael has been suing his ex for harassment.

Erin first made the claims in documents filed yesterday in New York as she was attempting to get Michael’s harassment suit against her dropped.

She also has an active restraining order out against Michael, which the father of Lindsay Lohan violated and was recently thrown in jail for.