South Carolina Gamecocks superfan Darius Rucker gave "Wagon Wheel" an R-rated upgrade during a concert this week ... getting the whole crowd to chant "f*** Tennessee" in the middle of it -- and it's incredible.
The Hootie and the Blowfish frontman was part of the South Carolina women's basketball championship party on Sunday night ... and naturally, he had to put his passion for the 'Cocks on full display.
In fact, when it came time to do his hit song, Rucker switched up the lyrics that go "But he's a-headin' west from the Cumberland Gap To Johnson City, Tennessee" .