Johnny Weir -- Victor Beat My Dog

Johnny Weir claims his estranged husband, Victor Weir-Voronov beat his tiny pooch ... this according to new legal docs obtained by TMZ.

Johnny claims Victor is lying when he says Tema, a Japanese chin, was the family dog. Johnny says it was his -- that he got Tema from a pet store, that Tema slept on his side of the bed, that Tema waited by the bathroom door when Johnny took a shower, that Tema followed Johnny all over the house.

Johnny thinks it's ironic that Victor is fighting for the dog, because he claims Victor is volatile and has seen him "strike the dog with force on occasion when we were married."

Johnny also says early this month when he went to pick up some items ... Tema was in a bag on the bed with Victor. Johnny claims Tema was crying and trying to claw his way out of the bag.

And Johnny has a lot more to say. In the docs he scoffs at Victor's claim he's worth $10 Mil, denying he signed a 7-figure deal with NBC. Johnny says, "If I had 10 million dollars I would not be living in a rented apartment in Lyndhurst and driving a leased Lexus SUV.

Johnny alleges a story TMZ broke earlier ... that Victor tried to extort him for $25K in return for not going public about the marriage.

Johnny says Victor ransacked their apartment and has stolen a number of precious items, including a Faberge egg, a Louis Vuitton trunk, jewelry and an Hermes ashtray.

And there's this revelation ... Johnny wears boxers. He says the only clothing that remained in the closet were some PJs, boxers and T-shirts.