Lil Wayne -- If Someone Sells a Sex Tape with My Socks On, I'll Sue!!!

Someone's shopping a sex tape around starring Lil Wayne and 2 chicks, but Wayne's reps tell TMZ, if a porn company dares to market it, they will have hell to pay.

We're told the big porn companies have been contacted by a person in possession of the tape, which shows Wayne in nothing but his socks, and 2 more-than-accommodating women who do all the work.

Wayne's rep says if there is a tape, the rapper didn't know he was being filmed. And the rep makes it clear they will pounce if a tape is released to the public, saying, "We'll sue the hell out of them."