Sumotori refers to a sumo wrestler. It's an interesting and somewhat unexpected word to find in a French rap song, making it memorable.
In the lyrics, Freeze Corleone says, "Gifle la prod comme un sumotori" (Slap the beat like a sumo wrestler). This vivid imagery conveys a sense of powerful, impactful, and dominant action, likening his musical delivery to the strength of a sumo wrestler.
Ancelotti is Freeze Corleone boasting about running his own career with the same precision as a top football manager plotting a match. He opens on a sampled news clip accusing him of using his talent for racist and antisemitic remarks, then spends the rest of the song answering on his own terms: dense wordplay, luxury flexing (real Rolexes and a fleet of Porsche Macans, as opposed to the fakes he says other rappers wear), and a stream of pop-culture and sports references, from Carlo Ancelotti's tactics to footballers like Mike Maignan and Hugo Lloris to the Joker and Breaking Bad's Heisenberg.
Underneath the boasting is a running theme of being underestimated and misread, the same media narrative he opens the song by quoting, while he stays confident his skill and strategy speak for themselves.