LSU has been trying like hell to stop the student section from chanting, "Suck that Tiger d**k, b*tch" during football games ... but LSU legend Marcus Spears says it just ain't gonna happen.
A little background ... whenever the LSU marching band plays Cameo's 1984 hit, "Talkin' Out The Side Of Your Neck," the student section shouts out the explicit alternate lyrics instead.
The school has made a concentrated effort to phase out the dirty chant -- but it hasn't worked. Here's video of the kids in Baton Rouge busting out the song as Joe Burrow and co.