Bryan Singer Accuser -- I Was Repeatedly Raped At Hollywood Orgies

Michael Egan, who just sued "X-Men" director Bryan Singer for allegedly sexually assaulting him when he was a minor, says he complained to the LAPD that he was repeatedly sodomized at Hollywood parties by various moguls ... but no action was taken.

Egan says he and other minors were passed around like pieces of meat at sex parties, and he claims Singer was not alone.

Egan says his mother went to the FBI and LAPD back in 2000 and he was even interviewed ... he has no idea what happened.

Egan says he sued 2 men who he claims molested him at parties back in 2000, but Singer was NOT named. Egan's current lawyer, Jeff Herman, doesn't know why his client's former lawyer did not sue the "X-Men" director.

The home where the sexually-charged pool parties allegedly occurred was in Encino. It used to be owned by Suge Knight, who sold it Marc Collins-Rector. Suge is not involved in the case, but Egan says Collins-Rector was one of the main perps. Criminal charges were filed against Collins-Rector -- he copped a plea to one count of having sex with a minor. Attorney Herman says Collins-Rector has fled the country.

Egan says the men at the party would pour liquor down his throat and then sexually assault him. In one case he says Collins-Rector put a gun in his mouth and threatened him.

Egan says other minors were also abused, and Herman vows to file 3 or 4 more lawsuits against the alleged perps by next Thursday.

Egan went on to say there was a "no swimsuit" rule in the pool, and he was raped numerous times by numerous individuals.

Herman said "Hollywood moguls have been using their positions of authority to exploit children sexually."

Bryan Singer's lawyer tells TMZ the allegations are absurd and defamatory.