Lil Wayne RAPS with Paris Hilton -- I Wanna Bang You [FULL SONG]

Lil Wayne wants to spend a night IN PARIS -- at least according to a new unreleased duet with Paris Hilton ... in which Weezy references the most famous sex tape of all time.

TMZ has obtained a copy of the song -- which Paris hopes to feature on an upcoming album -- and it's actually not that bad.

Among Wayne's borderline Seussical lyrics -- "Last night was awesome / Super f**king awesome / It was me, myself, and I, and her / We had ourselves a foursome."

But the clincher -- Weezy raps, "Excuse my french, but f**k the cameras / I wanna spend a night in Paris."

Obviously, he's not talking about the city ... or is he? (He isn't.)