Sean "Diddy" Combs is being sued for hitting a man at an after party held on the night of the Oscars.  We first told you about this story in February when TMZ.blog reported that a man alleges that Diddy hit him when he asked his girlfriend to simply get the hell out of dodge.

Diddy was celebrating the Academy Awards at the Roosevelt Hotel in Hollywood when he and the boys met a lady.  The problem started when "the lady's" boyfriend, Gerard Rechnitzer, came back from the toilet to find her surrounded by Diddy's posse.  He wanted to leave, but since her drunk ass was chillin' with Diddy - she didn't want to budge! 

Her boyfriend insisted that she go, and when he wouldn't give up -- Diddy knocked him right in the face. 

Rechnitzer filed a lawsuit against the rapper and music mogul at Los Angeles Superior Court on Friday. The 27-year-old is seeking unspecified punitive and compensatory damages for the incident.

Diddy's attorneys say the case won't hold up in court.

“Mr. Combs did not hit anyone and Mr. Rechnitzer suffered no injuries or damages whatsoever,” said a Combs attorney, Benjamin Brafman. “There is no case. It is that simple.” 

I dunno Diddy, they've got a Naomi picking up trash in NYC.  Anything is possible!