Lil Wayne Lawyers Up In Sex Tape Battle

Lil Wayne is on a mission to make his sex tape disappear ... now with the help of his legal guns.

Wayne's attorneys fired off a cease and desist letter -- obtained by TMZ -- to HollywoodStreetKing ... an urban blog that's been posting clips.

Wayne's legal team is demanding the site to remove the video within 5 days, or else. As for what "or else" means ... it's a lawsuit, dummy!

TMZ broke the story ... the tape shows Wayne wearing nothing but his socks, cavorting with 2 girls. The demand letter does not even concede there is a sex tape, but Wayne's rep tells us if there is one the rapper had NO idea he was being filmed.